Improved the docs

chesslablab · Dec 31, 2024 · 11c83df · 11c83df
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diff --git a/docs/heuristics.md b/docs/heuristics.md
@@ -290,7 +290,7 @@ Array
 And this is how to obtain the oscillations of all evaluation features after the second move (4 plies) has been played.
 
 ```php
-print_r($sanSignal->timeComponent[4]);
+print_r($sanSignal->spectrumComponent[4]);
 ```
 
 ```text
@@ -331,4 +331,6 @@ Array
 )
 ```
 
+![Figure 4](https://raw.githubusercontent.com/chesslablab/php-chess/main/docs/heuristics_04.png)
+
 🎉 So chess positions and games can be plotted on charts and processed with machine learning techniques. Become a better player by extracting knowledge from games with the help of [Data Mining](https://chesslablab.github.io/chess-data/data-mining/) tools.
diff --git a/docs/heuristics_04.png b/docs/heuristics_04.png