README.md is updated to include C++, Perl and R as prerequisites

[rsem.git] / README.md

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 ### Prerequisites
 
+C++ and Perl are required to be installed. 
+
 To take advantage of RSEM's built-in support for the Bowtie alignment
 program, you must have [Bowtie](http://bowtie-bio.sourceforge.net) installed.
 
+If you want to plot model learned by RSEM, you should also install R. 
+
 ## <a name="usage"></a> Usage
 
 ### I. Preparing Reference Sequences