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akita_acc1
2010 Jan 15
1
Remove part of string in colname and calculate mean for columns groups
...would like to remove the "_ACCX" or "_NAX" part below. Is there a method where the "_" as well as all characters after i can be removed?
> dim(exprdata)
[1] 88 512
>
> colnames(exprdata[,c(1:20)])
[1] "Akita_ACC1" "Akita_ACC2" "Akita_ACC3" "Akita_ACC4" "Alc.0_ACC1" "Alc.0_ACC2" "Alc.0_ACC3"
[8] "Alc.0_ACC4" "Alc.0_ACC5" "Bl.1_ACC1" "Bl.1_ACC2" "Bl.1_ACC3" "Bl.1_ACC4" "Bla.1_ACC1"
[15] "Bla.1_ACC2" "B...