Hi,

I wanted to read in a table that had hyphens in the header / column names. When I read it in however, it replaces the hyphens with a dot. Which parameter in the read.table function do I need to set to change this behaviour?
Example code:
jm <- matrix(1:4,2,2)
rownames(jm) <- c('a','b')
colnames(jm) <- c('a-1','a-2')
write.table(jm,'tjm.out',row.names=T,col.names=T,sep='\t')

mm <- read.table('tjm.out',row.names=1,header=T,sep='\t',colClasses = "character")
print(mm)
  a.1 a.2
a   1   3
b   2   4
I would like 'a-1' 'a-2' in the header and not a.1 & a.2
thanks.


      
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