Try
z$Col3 = as.numeric(sub('^X','',as.character(z$Col3)))
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Sat, 5 Jun 2010, bjlwilkin...@gmail.com wrote:
I have a data frame called z that includes four columns:
Col1 Col2 Col3 Col4
Text1 Text2 X0.1 5
Text1 Text2 X0.2 10
Text1 Text2 X0.3 15
Text1 Text3 X0.1 5
Text1 Text3 X0.2 10
Text1 Text3 X0.3 15
I am trying to convert the 3rd column to the numeric value excluding the X so
that I can produce a lattice plot.
I have tried a number of approaches including z$Col3[z$Col3=="X0.1"]="0.1" as a
first step but get an error: invalid factor level NAs generated.
Sent from my BlackBerry® wireless device
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