On Jul 22, 2009, at 4:02 AM, Uwe Ligges wrote:
Daniel Malter wrote:
XYZ=XYZ[XYZ$A==TRUE , ]
install.packages("fortunes")
library("fortunes")
fortune("==TRUE")
I've also made the repeated unnecessary invocation of which() in this
situation. But ... the OP asked for removal rather than inclusion of
such rows. So wouldn't he want something likef:
XYZ=XYZ[!XYZ$A , ]
Uwe Ligges
> should do. Note that this specific command
overwrites your XYZ dataframe. If you want to keep XYZ, you will
want to
name the newly created frame differently.
HTH,
Daniel
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Gesendet: Wednesday, July 22, 2009 12:24 AM
An: r-help@r-project.org
Betreff: [R] How do I delete a row from a data frame when varA ==
"TRUE"
I want to delete a row from a data frame XYZ where A == "TRUE".
Let's
assume there are five variables in this data frame XYZ. My
deletion is
based on the TRUE vs. FALSE value under variable A. How do I do
this?
Thanks!
My current code: for (i in 1:length(XYZ$A)) if (XYZ$A == "FALSE")
XYZ<-XYZ else XYZ<-
XYZ[-i,]
Error message is:
Error in if (XYZ$A == "FALSE") XYZ<-XYZ else XYZ<- XYZ[-i, :
missing value where TRUE/FALSE needed
Please help!!
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