Update README.md

examples/A first look at R/README.md

@@ -2,14 +2,14 @@
 
 These scripts let you take R for a test drive.
 
-#### 1-Getting_Started_with_R.R
+#### 1 Getting Started with R.R
 The comments of this script give helpful information about R and how to use it.
 To get the most out of it, set the cursor at the top of the script and press
 CTRL-Enter to scroll through it line by line. This will let you see the output of
 each command. Getting Started shows you some R fundamentals, like installing
 packages, loading data, plotting it and fitting a model. 
 
-#### 2-Introduction_to_ggplot2.R  
+#### 2 Introduction to ggplot2.R  
 ggplot2 is an R graphing package known for its visually appealing plots
 and simple syntax.
 Execute this script line by line by pressing CTRL-Enter to see several options