On 03/04/2010 05:51 PM, Sarah Henderson wrote:
Hi all --
I think my Python brain is missing something crucial about string
operations in R, but I cannot figure this out.
I have a large data frame with several groups of similar variables.
Similar variables are named according to their group, and I am now
writing a function to check correlations within groups. I want to
subset the data frame by partial variable name, something along the
lines of this:
partialName<- "XXX"
subsetData<- bigData[, partialName in colnames(bigData)]
Where bigData might have 10 columns named "XXX1", "XXX2" etc.
Hi Sarah,
Try this:
column.names<-paste(sample(c("X","Y","Z"),100,TRUE),
sample(c("X","Y","Z"),100,TRUE),
sample(c("X","Y","Z"),100,TRUE),
sample(0:9,100,TRUE),sep="")
column.names[grep("XXX",column.names,fixed=TRUE)]
Jim
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