sort link order

Author: gordondavies

README.md

@@ -28,8 +28,8 @@ programming fundamentals, which we're now going to go through.
 
 - [Programming fundamentals](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/programming-fundamentals.md)
 - [Matlab](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/matlab.md)
-- [R](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/r.md)
 - [Python](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/python.md)
+- [R](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/r.md)
 
 
 

matlab.md

@@ -303,3 +303,7 @@ When installing Matlab, a lot of the toolboxes that are available are unlikely t
 - Bioinformatics Toolbox
 - Image Processing Toolbox
 - Statistics and Machine Learning Toolbox
+
+
+
+- [R tutorial](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/r.md)

programming-fundamentals.md

@@ -376,3 +376,6 @@ out what the hell was going on.
 
 
 Keeping your data and code organised well will help you 6 months down the line.
+
+
+- [Matlab tutorial](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/matlab.md)

python.md

@@ -6,7 +6,7 @@
 
 ## Installing Python
 
-Python is a bit more complicated, as it is general-purpose programming language.
+Compared to Matlab and R, Python is fairly complicated to install and use, as it is general-purpose programming language.
 The situation is made more complicated by different versions (2.x vs 3.x), and different package managers.
 
 ### Virtualenv

r.md

@@ -449,3 +449,6 @@ Beside the builtin functions, there are several packages designed to produce hig
 Here, it is possible to find nice examples of data graphs generated using ```ggplot2```
 
 - [R Graphs](http://www.cookbook-r.com/Graphs/)
+
+
+- [Python tutorial](https://github.com/csmsoftware/Programming-for-data-analysis-tutorial-Matlab-R-Python/blob/master/r.md)