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<span>PyGeode 1.4.1-rc2 documentation</span></a></h1>
<h2 class="heading"><span>Array manipulation routines</span></h2>
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<div class="section" id="array-manipulation-routines">
<h1>Array manipulation routines<a class="headerlink" href="#array-manipulation-routines" title="Permalink to this headline">¶</a></h1>
<p>Operations that affect the shape or other attributes of the <cite>Var</cite>, while leaving the data intact.</p>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.__call__">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">__call__</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">ignore_mismatch</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/pygeode/var.html#Var.__call__"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pygeode.Var.__call__" title="Permalink to this definition">¶</a></dt>
<dd><p>Keyword-based data subsetting.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>ignore_mismatch</strong><span class="classifier">boolean (optional)</span></dt><dd><p>If <code class="docutils literal notranslate"><span class="pre">True</span></code>, any keywords that don’t match an axis are ignored.
Default is <code class="docutils literal notranslate"><span class="pre">False</span></code></p>
</dd>
<dt><strong>**kwargs</strong><span class="classifier">one or more keyword parameters</span></dt><dd><p>The keys are the Axis names (or Axis class names), and the values are
either a <cite>tuple</cite> of the desired (lower,upper) range, or a single Axis
value. E.g., <code class="docutils literal notranslate"><span class="pre">lat</span> <span class="pre">=</span> <span class="pre">(-45,45)</span></code> or <code class="docutils literal notranslate"><span class="pre">lat</span> <span class="pre">=</span> <span class="pre">10.5</span></code></p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>subset_var</strong><span class="classifier">Var</span></dt><dd><p>A new Var, restricted to the specified domain.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Notes</p>
<p>There are a couple of special prefixes which can be prepended to each
keyword to alter the subsetting behaviour. They can be used together.</p>
<blockquote>
<div><ul class="simple">
<li><p><strong>i_</strong> indicates that the values are <em>indices</em> into the axis, and not
the axis values themselves. Indices start at 0.
E.g. <code class="docutils literal notranslate"><span class="pre">myvar(i_time</span> <span class="pre">=</span> <span class="pre">0)</span></code> selects the first time step of the variable,
and <code class="docutils literal notranslate"><span class="pre">myvar(i_lon=(10,20))</span></code> selects the 11th through 21st longitudes.</p></li>
<li><p><strong>l_</strong> indicates that you are providing an explicit list of
coordinates, instead of a range.
E.g. <code class="docutils literal notranslate"><span class="pre">myvar(l_lon</span> <span class="pre">=</span> <span class="pre">(105.,106.,107.,108))</span></code></p></li>
<li><p><strong>n_</strong> returns the complement of the set you request; that is,
everything except the specified selection.
E.g. <code class="docutils literal notranslate"><span class="pre">myvar(n_lat</span> <span class="pre">=</span> <span class="pre">(60,</span> <span class="pre">90))</span></code> returns all latitudes except those between 60 and 90N.</p></li>
<li><p><strong>m_</strong> triggers an arithmetic mean over the specified range.
E.g., <code class="docutils literal notranslate"><span class="pre">myvar(m_lon</span> <span class="pre">=</span> <span class="pre">(10,</span> <span class="pre">80))</span></code> is a shortcut for doing
<code class="docutils literal notranslate"><span class="pre">myvar(lon</span> <span class="pre">=</span> <span class="pre">(10,80)).mean('lon')</span></code>.</p></li>
<li><p><strong>s_</strong> triggers a call to squeeze on the specified axis, so
that if only one value is selected the degenerate axis is removed.
E.g., <code class="docutils literal notranslate"><span class="pre">myvar(s_lon</span> <span class="pre">=</span> <span class="pre">5)</span></code> is a shortcut for doing
<code class="docutils literal notranslate"><span class="pre">myvar(lon</span> <span class="pre">=</span> <span class="pre">5).squeeze()</span></code> or <code class="docutils literal notranslate"><span class="pre">myvar.squeeze(lon=5)</span></code>.</p></li>
</ul>
</div></blockquote>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">vars</span><span class="p">)</span>
<span class="go">[<Var 'Temp'>]</span>
<span class="gp">>>> </span><span class="n">T</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">T</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">T</span><span class="p">(</span><span class="n">lat</span><span class="o">=</span><span class="mi">30</span><span class="p">,</span><span class="n">lon</span><span class="o">=</span><span class="p">(</span><span class="mi">100</span><span class="p">,</span><span class="mi">200</span><span class="p">)))</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (1,17)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 30 N</span>
<span class="go"> lon <Lon> : 102 E to 198 E (17 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: SlicedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="pygeode.Var.slice">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">slice</span></span><a class="headerlink" href="#pygeode.Var.slice" title="Permalink to this definition">¶</a></dt>
<dd><p>A helper to select subsets of this variable using slice notation. See <a class="reference internal" href="#pygeode.Var._getitem_asvar" title="pygeode.Var._getitem_asvar"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Var._getitem_asvar()</span></code></a>.</p>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var._getitem_asvar">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">_getitem_asvar</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">slices</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/pygeode/var.html#Var._getitem_asvar"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#pygeode.Var._getitem_asvar" title="Permalink to this definition">¶</a></dt>
<dd><p>Slice-based data subsetting.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>slices</strong><span class="classifier">list of slices</span></dt><dd></dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>subset_var</strong><span class="classifier">Var</span></dt><dd><p>A new Var, restricted to the specified domain.</p>
</dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference internal" href="#pygeode.Var.slice" title="pygeode.Var.slice"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Var.slice</span></code></a>, <a class="reference internal" href="#pygeode.Var.__call__" title="pygeode.Var.__call__"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Var.__call__</span></code></a>, <a class="reference internal" href="var.get.html#pygeode.Var.__getitem__" title="pygeode.Var.__getitem__"><code class="xref py py-obj docutils literal notranslate"><span class="pre">Var.__getitem__</span></code></a></dt><dd></dd>
</dl>
</div>
<p class="rubric">Notes</p>
<p>A helper function so that standard python slicing notation
can be used to subset a Var without loading the underlying
data. A new Var object is returned.</p>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">slice</span><span class="p">[</span><span class="mi">10</span><span class="p">:</span><span class="o">-</span><span class="mi">10</span><span class="p">,</span> <span class="p">::</span><span class="mi">10</span><span class="p">])</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (11,6)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 30 S to 30 N (11 values)</span>
<span class="go"> lon <Lon> : 0 E to 300 E (6 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: SlicedVar (dtype="float64")</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">slice</span><span class="p">[</span><span class="mi">17</span><span class="p">,</span> <span class="p">:])</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (1,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 12 N</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: SlicedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.squeeze">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">squeeze</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">iaxes</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.squeeze" title="Permalink to this definition">¶</a></dt>
<dd><p>Removes degenerate axes from a variable, reducing its dimensionality.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>*iaxes</strong><span class="classifier">one or more axes (optional)</span></dt><dd><p>The axes to remove (they must already be degenerate). If no explicit axes
are provided, then <em>all</em> degenerate axes are removed.</p>
</dd>
<dt><strong>**kwargs</strong><span class="classifier">keyword arguments</span></dt><dd><p>Keyword-based axis slicing. Selects a particular value along the axis and
then removes the axis from the output. See <a class="reference internal" href="#pygeode.Var.__call__" title="pygeode.Var.__call__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Var.__call__()</span></code></a> for a
similar method which uses this keyword syntax.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>squeezed</strong><span class="classifier">Var</span></dt><dd><p>The squeezed variable</p>
</dd>
</dl>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.extend">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">extend</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">pos</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">newaxes</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.extend" title="Permalink to this definition">¶</a></dt>
<dd><p>Adds more axes to a variable. Data will be duplicated along these new axes.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>pos</strong><span class="classifier">int</span></dt><dd><p>The position (within the variable’s current axes) to start inserting the
new axes.</p>
</dd>
<dt><strong>*newaxes</strong><span class="classifier">one or more axes</span></dt><dd><p>The new axes to insert</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>extended_var</strong><span class="classifier">Var</span></dt><dd><p>The variable, extended to include the new axes.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode</span> <span class="kn">import</span> <span class="n">Pres</span>
<span class="gp">>>> </span><span class="n">paxis</span> <span class="o">=</span> <span class="n">Pres</span><span class="p">([</span><span class="mi">1000</span><span class="p">,</span><span class="mi">850</span><span class="p">,</span><span class="mi">700</span><span class="p">])</span> <span class="c1"># Create a pressure axis</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">paxis</span><span class="p">)</span>
<span class="go">pres <Pres> : 1000 hPa to 700 hPa (3 values)</span>
<span class="gp">>>> </span><span class="n">extended_var</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">paxis</span><span class="p">)</span> <span class="c1"># Extend the data with this axis</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">extended_var</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (pres,lat,lon) (3,31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> pres <Pres> : 1000 hPa to 700 hPa (3 values)</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: ExtendedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.transpose">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">transpose</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">axes</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.transpose" title="Permalink to this definition">¶</a></dt>
<dd><p>Transposes the axes of a variable.</p>
<dl class="field-list">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl>
<dt><strong>*axes</strong><span class="classifier">one or more axis identifiers (strings, <a class="reference internal" href="axes.html#pygeode.Axis" title="pygeode.Axis"><code class="xref py py-class docutils literal notranslate"><span class="pre">Axis</span></code></a> classes, integer indices)</span></dt><dd><p>The new order of the axes. Any unspecified axes will be appended after these.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>transposed_var</strong><span class="classifier">Var</span></dt><dd><p>The transposed variable.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="n">transposed_var</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">transpose</span><span class="p">(</span><span class="s1">'lon'</span><span class="p">,</span><span class="s1">'lat'</span><span class="p">)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">transposed_var</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lon,lat) (60,31)</span>
<span class="go"> Axes:</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: TransposedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.sorted">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">sorted</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="o"><span class="pre">*</span></span><span class="n"><span class="pre">iaxes</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.sorted" title="Permalink to this definition">¶</a></dt>
<dd><p>Sorts the data so that the axes have monotonically increasing values.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>*iaxes</strong><span class="classifier">(optional)</span></dt><dd><p>Which axes to sort. If not specified, then <em>all</em> axes are sorted.
Axes can also be passed as keyword arguments, with a value of 1/0/-1 to
specifiy a sort order of increasing/default/decreasing.
If positional arguments are passed, or if an order of ‘0’ is specified,
then the natural (default) order will be used for that type of axis.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>sorted_var</strong><span class="classifier">Var</span></dt><dd><p>The sorted version of the data.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t2</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t2</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Shape: (time,pres,lat,lon) (3650,20,31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> time <ModelTime365>: Jan 1, 2011 00:00:00 to Dec 31, 2020 00:00:00 (3650 values)</span>
<span class="go"> pres <Pres> : 1000 hPa to 50 hPa (20 values)</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: TransposedVar (dtype="float64")</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t2</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">sorted</span><span class="p">(</span><span class="s1">'pres'</span><span class="p">))</span> <span class="c1"># Sort by default/natural order</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Shape: (time,pres,lat,lon) (3650,20,31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> time <ModelTime365>: Jan 1, 2011 00:00:00 to Dec 31, 2020 00:00:00 (3650 values)</span>
<span class="go"> pres <Pres> : 1000 hPa to 50 hPa (20 values)</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: SortedVar (dtype="float64")</span>
<span class="gp">>>> </span><span class="c1"># ^^ no change, since pressure was already in its natrual order (decreasing)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t2</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">sorted</span><span class="p">(</span><span class="n">pres</span><span class="o">=</span><span class="mi">1</span><span class="p">))</span> <span class="c1"># Sort pressure explicitly as increasing order</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Shape: (time,pres,lat,lon) (3650,20,31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> time <ModelTime365>: Jan 1, 2011 00:00:00 to Dec 31, 2020 00:00:00 (3650 values)</span>
<span class="go"> pres <Pres> : 50 hPa to 1000 hPa (20 values)</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: SortedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.replace_axes">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">replace_axes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">axisdict</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">{}</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">ignore_mismatch</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">newaxes</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">None</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">keep_old_name</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">kwargs</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.replace_axes" title="Permalink to this definition">¶</a></dt>
<dd><p>Replaces one or more axes of a variable with new axes. The axis length
must remain the same.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>axisdict</strong><span class="classifier">dict (optional)</span></dt><dd><p>The keys are identifiers for the current axes, and the values are the
replacement axes.</p>
</dd>
<dt><strong>ignore_mismatch</strong><span class="classifier">boolean (optional)</span></dt><dd><p>If <code class="docutils literal notranslate"><span class="pre">True</span></code>, will ignore axis identifiers that don’t match any axes of
this variable. If <code class="docutils literal notranslate"><span class="pre">False</span></code>, will raise an exception on a mismatch.
Default is <code class="docutils literal notranslate"><span class="pre">False</span></code>.</p>
</dd>
<dt><strong>newaxes</strong><span class="classifier">list of axes (optional)</span></dt><dd><p>An explicit list of axes to use as replacements. Useful if you want to
replace <em>all</em> the axes at the same time.</p>
</dd>
<dt><strong>keep_old_name</strong><span class="classifier">boolean (optional)</span></dt><dd><p>If <code class="docutils literal notranslate"><span class="pre">True</span></code>, will keep the old axis name (with the new values). If
<code class="docutils literal notranslate"><span class="pre">False</span></code>, the name ofthe new axis will be used. Default is <code class="docutils literal notranslate"><span class="pre">True</span></code>.</p>
</dd>
<dt><strong>**kwargs</strong><span class="classifier">keyword arguments</span></dt><dd><p>Similar to ‘axisdict’, but using keyword parameters instead of a
dictionary.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>new_var</strong><span class="classifier">Var</span></dt><dd><p>The same variable, but with different axes. The variable data will remain
unchanged.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode</span> <span class="kn">import</span> <span class="n">XAxis</span><span class="p">,</span> <span class="n">YAxis</span>
<span class="gp">>>> </span><span class="n">new_var</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">replace_axes</span><span class="p">(</span><span class="n">lon</span><span class="o">=</span><span class="n">XAxis</span><span class="p">,</span> <span class="n">lat</span><span class="o">=</span><span class="n">YAxis</span><span class="p">)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">new_var</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <YAxis> : -90 to 90 (31 values)</span>
<span class="go"> lon <XAxis> : 0 to 354 (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Replace_axes (dtype="float64")</span>
<span class="gp">>>> </span><span class="n">new_var</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">replace_axes</span><span class="p">(</span><span class="n">lon</span><span class="o">=</span><span class="n">XAxis</span><span class="p">,</span> <span class="n">lat</span><span class="o">=</span><span class="n">YAxis</span><span class="p">,</span> <span class="n">keep_old_name</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">new_var</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (yaxis,xaxis) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> yaxis <YAxis> : -90 to 90 (31 values)</span>
<span class="go"> xaxis <XAxis> : 0 to 354 (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Replace_axes (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.rename">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">rename</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">newname</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.rename" title="Permalink to this definition">¶</a></dt>
<dd><p>Assigns a new name to a variable</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>newname</strong><span class="classifier">string</span></dt><dd><p>The new name of the variable.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>renamed_var</strong><span class="classifier">Var</span></dt><dd><p>The same variable, but with a different name.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Notes</p>
<p>In most cases, you could probably change the <code class="docutils literal notranslate"><span class="pre">name</span></code> attribute of the
variable directly instead of calling this method. However, if the variable
is being used in other places, this method guarantees that the name change
will only affect a local version of the variable, and won’t have any
side-effects on other existing references.</p>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">rename</span><span class="p">(</span><span class="s1">'i_prefer_really_long_variable_names'</span><span class="p">))</span>
<span class="go"><Var 'i_prefer_really_long_variable_names'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: RenamedVar (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.rename_axes">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">rename_axes</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">ignore_mismatch</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">False</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">axisdict</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">{}</span></span></em>, <em class="sig-param"><span class="o"><span class="pre">**</span></span><span class="n"><span class="pre">namemap</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.rename_axes" title="Permalink to this definition">¶</a></dt>
<dd><p>Renames the axes of a variable.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>ignore_mismatch</strong><span class="classifier">boolean (optional)</span></dt><dd><p>If <code class="docutils literal notranslate"><span class="pre">True</span></code>, will ignore axis identifiers that don’t match any axes of
this variable. If <code class="docutils literal notranslate"><span class="pre">False</span></code>, will raise an exception on a mismatch.
Default is <code class="docutils literal notranslate"><span class="pre">False</span></code>.</p>
</dd>
<dt><strong>axisdict</strong><span class="classifier">dictionary</span></dt><dd><p>An explicit dictionary mapping old names to new names.</p>
</dd>
<dt><strong>**namemap</strong><span class="classifier">keyword arguments</span></dt><dd><p>One or more keyword-based arguments. The parameters are the existing axis
names, and the values are the new names to substitute.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>new_var</strong><span class="classifier">Var</span></dt><dd><p>The same variable, but with new names for the axes.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Add_Var (dtype="float64")</span>
<span class="gp">>>> </span><span class="n">new_var</span> <span class="o">=</span> <span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">rename_axes</span><span class="p">(</span><span class="n">lat</span><span class="o">=</span><span class="s2">"latitude"</span><span class="p">,</span><span class="n">lon</span><span class="o">=</span><span class="s2">"longitude"</span><span class="p">)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">new_var</span><span class="p">)</span>
<span class="go"><Var 'Temp'>:</span>
<span class="go"> Units: K Shape: (latitude,longitude) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> latitude <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> longitude <Lon>: 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Replace_axes (dtype="float64")</span>
</pre></div>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.fill">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">fill</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">fill</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.fill" title="Permalink to this definition">¶</a></dt>
<dd><p>Replaces <code class="docutils literal notranslate"><span class="pre">NaN</span></code> (missing values) with some fill value.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>fill</strong><span class="classifier">float or int</span></dt><dd><p>The fill value</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>filled_var</strong><span class="classifier">Var</span></dt><dd><p>A new representation of the variable with missing values filled in.</p>
</dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference internal" href="#pygeode.Var.unfill" title="pygeode.Var.unfill"><code class="xref py py-obj docutils literal notranslate"><span class="pre">unfill</span></code></a></dt><dd></dd>
</dl>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.unfill">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">unfill</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">fill</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.unfill" title="Permalink to this definition">¶</a></dt>
<dd><p>Replaces all occurrences of the specified value with an <code class="docutils literal notranslate"><span class="pre">NaN</span></code> (missing
value).</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl class="simple">
<dt><strong>fill - float or int</strong></dt><dd><p>The value to treat as missing</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>unfilled_var</strong><span class="classifier">Var</span></dt><dd><p>A new represntation of the variable with the ‘fill’ values removed
(replaced with <code class="docutils literal notranslate"><span class="pre">NaN</span></code>).</p>
</dd>
</dl>
</dd>
</dl>
<div class="admonition seealso">
<p class="admonition-title">See also</p>
<dl class="simple">
<dt><a class="reference internal" href="#pygeode.Var.fill" title="pygeode.Var.fill"><code class="xref py py-obj docutils literal notranslate"><span class="pre">fill</span></code></a></dt><dd></dd>
</dl>
</div>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="pygeode.Var.as_type">
<span class="sig-prename descclassname"><span class="pre">Var.</span></span><span class="sig-name descname"><span class="pre">as_type</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">dtype</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#pygeode.Var.as_type" title="Permalink to this definition">¶</a></dt>
<dd><p>Casts a variable to a new data type (I.e., float32, float64, etc.)</p>
<dl class="field-list">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><dl>
<dt><strong>dtype</strong><span class="classifier"><code class="docutils literal notranslate"><span class="pre">numpy.dtype</span></code> or string</span></dt><dd><p>The new data type to use.</p>
</dd>
</dl>
</dd>
<dt class="field-even">Returns</dt>
<dd class="field-even"><dl class="simple">
<dt><strong>casted_var</strong><span class="classifier">Var</span></dt><dd><p>The same var, but with its values cast into a new type.</p>
</dd>
</dl>
</dd>
</dl>
<p class="rubric">Examples</p>
<div class="doctest highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">pygeode.tutorial</span> <span class="kn">import</span> <span class="n">t1</span>
<span class="gp">>>> </span><span class="c1"># Treat the values as single-precision</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">t1</span><span class="o">.</span><span class="n">Temp</span><span class="o">.</span><span class="n">as_type</span><span class="p">(</span><span class="s1">'float32'</span><span class="p">))</span>
<span class="go"><Var 'Temp' float32>:</span>
<span class="go"> Units: K Shape: (lat,lon) (31,60)</span>
<span class="go"> Axes:</span>
<span class="go"> lat <Lat> : 90 S to 90 N (31 values)</span>
<span class="go"> lon <Lon> : 0 E to 354 E (60 values)</span>
<span class="go"> Attributes:</span>
<span class="go"> {}</span>
<span class="go"> Type: Cast (dtype="float32")</span>
</pre></div>
</div>
</dd></dl>
<hr class="docutils" />
<p>See Also:
<a class="reference internal" href="var.html"><span class="doc">Var class overview</span></a></p>
</div>
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