[R] How do I delete a row from a data frame when varA == "TRUE"

[Daniel Malter]

XYZ=XYZ[XYZ$A==TRUE , ] 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

-------------------------
cuncta stricte discussurus
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Von: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Im
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Gesendet: Wednesday, July 22, 2009 12:24 AM
An: r-help at 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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