Added instruction for creating the figures

Author: rougier

README.md

@@ -3,13 +3,26 @@ Various cheat sheets for matplotlib
 
 # How to compile
 
-You need to create a `fonts` repository with:
+1. You need to create a `fonts` repository with:
 
 * `fonts/roboto/*`           : See https://fonts.google.com/specimen/Roboto
 * `fonts/source-code-pro/*`  : See https://fonts.google.com/specimen/Source+Code+Pro
 * `fonts/source-sans-pro/*`  : See https://fonts.google.com/specimen/Source+Sans+Pro
 * `fonts/source-serif-pro/*` : See https://fonts.google.com/specimen/Source+Serif+Pro
 
-Then: `xelatex cheatsheet-basic.tex`
+2. You need to generate all the figures:
+
+```
+$ cd scripts
+$ for script in *.py; do python $script; done
+$ cd ..
+```
+
+3. Compile the sheet
+```
+$ xelatex cheatsheet-basic.tex
+$ xelatex cheatsheet-basic.tex
+```
+