Use R for Data Science 2nd Edition

README.Rmd

@@ -26,7 +26,7 @@ knitr::opts_chunk$set(
 Date-time data can be frustrating to work with in R. R commands for date-times are generally unintuitive and change depending on the type of date-time object being used. Moreover, the methods we use with date-times must be robust to time zones, leap days, daylight savings times, and other time related quirks, and R lacks these capabilities in some situations. Lubridate makes it easier to do the things R does with date-times and possible to do the things R does not.
 
 If you are new to lubridate, the best place to start is the
-[date and times chapter](https://r4ds.had.co.nz/dates-and-times.html) in R
+[date and times chapter](https://r4ds.hadley.nz/datetimes.html) in R
 for data science.
 
 

README.md

@@ -1,32 +1,35 @@
----
-output: github_document
----
 
 <!-- README.md is generated from README.Rmd. Please edit that file -->
 
-
-
 # lubridate <img src="man/figures/logo.png" align="right" />
 
 <!-- badges: start -->
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-[![CRAN RStudio mirror downloads](http://cranlogs.r-pkg.org/badges/lubridate)](https://cran.r-project.org/package=lubridate)
+
+[![CRAN
+version](http://www.r-pkg.org/badges/version/lubridate)](https://cran.r-project.org/package=lubridate)
+[![R build
+status](https://github.com/tidyverse/lubridate/workflows/R-CMD-check/badge.svg)](https://github.com/tidyverse/lubridate/actions)
+[![CRAN RStudio mirror
+downloads](http://cranlogs.r-pkg.org/badges/lubridate)](https://cran.r-project.org/package=lubridate)
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 <!-- badges: end -->
 
 ## Overview
 
-Date-time data can be frustrating to work with in R. R commands for date-times are generally unintuitive and change depending on the type of date-time object being used. Moreover, the methods we use with date-times must be robust to time zones, leap days, daylight savings times, and other time related quirks, and R lacks these capabilities in some situations. Lubridate makes it easier to do the things R does with date-times and possible to do the things R does not.
-
-If you are new to lubridate, the best place to start is the
-[date and times chapter](https://r4ds.had.co.nz/dates-and-times.html) in R
-for data science.
+Date-time data can be frustrating to work with in R. R commands for
+date-times are generally unintuitive and change depending on the type of
+date-time object being used. Moreover, the methods we use with
+date-times must be robust to time zones, leap days, daylight savings
+times, and other time related quirks, and R lacks these capabilities in
+some situations. Lubridate makes it easier to do the things R does with
+date-times and possible to do the things R does not.
 
+If you are new to lubridate, the best place to start is the [date and
+times chapter](https://r4ds.hadley.nz/datetimes.html) in R for data
+science.
 
 ## Installation
 
-
 ``` r
 # The easiest way to get lubridate is to install the whole tidyverse:
 install.packages("tidyverse")
@@ -45,66 +48,67 @@ devtools::install_github("tidyverse/lubridate")
 
 ## Features
 
-
 ``` r
 library(lubridate, warn.conflicts = FALSE)
 ```
 
-*   Easy and fast parsing of date-times: `ymd()`, `ymd_hms`, `dmy()`, `dmy_hms`,
-    `mdy()`, ...
-
-
-    ``` r
-    ymd(20101215)
-    #> [1] "2010-12-15"
-    mdy("4/1/17")
-    #> [1] "2017-04-01"
-    ```
-
-*   Simple functions to get and set components of a date-time, such as `year()`,
-    `month()`, `mday()`, `hour()`, `minute()` and `second()`:
-
-
-    ``` r
-    bday <- dmy("14/10/1979")
-    month(bday)
-    #> [1] 10
-    wday(bday, label = TRUE)
-    #> [1] Sun
-    #> Levels: Sun < Mon < Tue < Wed < Thu < Fri < Sat
-
-    year(bday) <- 2016
-    wday(bday, label = TRUE)
-    #> [1] Fri
-    #> Levels: Sun < Mon < Tue < Wed < Thu < Fri < Sat
-    ```
-
-*   Helper functions for handling time zones: `with_tz()`, `force_tz()`
-
-
-    ``` r
-    time <- ymd_hms("2010-12-13 15:30:30")
-    time
-    #> [1] "2010-12-13 15:30:30 UTC"
-
-    # Changes printing
-    with_tz(time, "America/Chicago")
-    #> [1] "2010-12-13 09:30:30 CST"
-
-    # Changes time
-    force_tz(time, "America/Chicago")
-    #> [1] "2010-12-13 15:30:30 CST"
-    ```
-
-Lubridate also expands the type of mathematical operations that can be performed with date-time objects. It introduces three new time span classes borrowed from https://www.joda.org.
-
-* `durations`, which measure the exact amount of time between two points
-
-* `periods`, which accurately track clock times despite leap years, leap
+- Easy and fast parsing of date-times: `ymd()`, `ymd_hms`, `dmy()`,
+  `dmy_hms`, `mdy()`, …
+
+  ``` r
+  ymd(20101215)
+  #> [1] "2010-12-15"
+  mdy("4/1/17")
+  #> [1] "2017-04-01"
+  ```
+
+- Simple functions to get and set components of a date-time, such as
+  `year()`, `month()`, `mday()`, `hour()`, `minute()` and `second()`:
+
+  ``` r
+  bday <- dmy("14/10/1979")
+  month(bday)
+  #> [1] 10
+  wday(bday, label = TRUE)
+  #> [1] Sun
+  #> Levels: Sun < Mon < Tue < Wed < Thu < Fri < Sat
+
+  year(bday) <- 2016
+  wday(bday, label = TRUE)
+  #> [1] Fri
+  #> Levels: Sun < Mon < Tue < Wed < Thu < Fri < Sat
+  ```
+
+- Helper functions for handling time zones: `with_tz()`, `force_tz()`
+
+  ``` r
+  time <- ymd_hms("2010-12-13 15:30:30")
+  time
+  #> [1] "2010-12-13 15:30:30 UTC"
+
+  # Changes printing
+  with_tz(time, "America/Chicago")
+  #> [1] "2010-12-13 09:30:30 CST"
+
+  # Changes time
+  force_tz(time, "America/Chicago")
+  #> [1] "2010-12-13 15:30:30 CST"
+  ```
+
+Lubridate also expands the type of mathematical operations that can be
+performed with date-time objects. It introduces three new time span
+classes borrowed from <https://www.joda.org>.
+
+- `durations`, which measure the exact amount of time between two points
+
+- `periods`, which accurately track clock times despite leap years, leap
   seconds, and day light savings time
 
-* `intervals`, a protean summary of the time information between two points
+- `intervals`, a protean summary of the time information between two
+  points
 
 ## Code of Conduct
 
-Please note that the lubridate project is released with a [Contributor Code of Conduct](https://lubridate.tidyverse.org/CODE_OF_CONDUCT.html). By contributing to this project, you agree to abide by its terms.
+Please note that the lubridate project is released with a [Contributor
+Code of Conduct](https://lubridate.tidyverse.org/CODE_OF_CONDUCT.html).
+By contributing to this project, you agree to abide by its terms.

_pkgdown.yml

@@ -14,7 +14,7 @@ development:
 home:
   links:
   - text: Learn more
-    href: https://r4ds.had.co.nz/dates-and-times.html
+    href: https://r4ds.hadley.nz/datetimes.html
 
 reference:
 - title: Date/time parsing