Dear All,
I am lost about the following. I have got a large dataframe (largeset) with in
the first column identification numbers as factors
largeset$ID
p000345
p000356
p000569
etc
--
in order to use them to merge with another dataframe with numerical values
(000345, 000356) I want to convert them to numerical.
>as.numeric(as.character(largeset$ID)) gives NA's
>as.numeric(strsplit(as.character(largeset[,1]), "p")) also fails:
Error in as.double.default(strsplit(as.character(largeset[, 1]), "p")) :
unimplemented type 'character' in 'asReal'
Any suggestions would be very appreciated
Marco
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