Message-ID: <4a65357c-7c9c-4f61-ba42-51aa0f296c43@e16g2000pri.googlegroups.com>
Date: 2010-12-07T18:19:46Z
From: Jahan
Subject: Changing names of a string variable
Hello,
Here is the data set I am working with:
dat=read.csv('http://dl.dropbox.com/u/1852742/relexpressions.csv')
names(dat)
#Under the 'target' column, I want to change all of the values into
all capital letters (e.g. fgf2 becomes FGF2). I have taken a loop
approach but I think my Python background is confusing me. Here is
what I attempted:
for(line in dat[,1]){if(line=='fgf2'){line<-'FGF2'}}
#I made sure that it was looping through each line by entering:
for(line in dat[,1]){if(line=='fgf2'){print(line)}} #Which did exactly
what I thought it would.
#This doesn't change anything, though. Also, after reading the
documentation I am still confused how to add multiple "if"
statements. I would need that because I need to change the names of
fgf2, fgf7, and fgf10.
#I am sure there is a built-in function to do what I need, but I
haven't found it yet so I tried this loop method. Any help is greatly
appreciated!
Jahan