Question

I need to re-shape my data frame using regexp and, in particular, this kind of line

X21_GS04.A.mzdata

must became:

GS04.A

I tryed

pluto <- sub('^X[0-90_]+','', my.data.frame$File.Name, perl=TRUE)

and it works; than I tryed

pluto <- sub('.mzdata$','', my.data.frame$File.Name, perl=TRUE)

and it works too.

The problem is that I have no idea how to combine the two code in one, I tryed a script such this

pluto <- sub('^X[0-90_]+ | .mzdata$','', my.data.frame$File.Name, perl=TRUE)

but nothing appens.
Can someone say to me where I wrong??

Best
Riccardo

Answer 1

Remove space in your regex. Also escape . char: \., i.e.:

^X[0-9]+_|\.mzdata$