Reading and writing data in R exercises

These exercises cover the sections of Introduction to R. All files can be found in the “data” directory.

Exercise 1

Have a look at all files in notepad or excel before attempting to read. The files will all be found under the data/ directory.

• Read in the tab delimited file “GeneExpression.txt”

• Find the mean expression of all samples.

• Read in the tab delimited file “GeneExpressionWithMethods.txt”. This file contains information on analysis steps used to produce file.

• Read in the tab delimited file “GeneExpressionWithNotes.txt”. This file contains notes about particular genes.

• Read in tab delimited file “GeneExpression.txt”. Order genes by their average expression. Write out a new comma separated file with column titles.