[R] $ operator is invalid for atomic vectors

Pete Brecknock Peter.Brecknock at bp.com
Wed Jan 19 01:39:47 CET 2011


It would have been helpful if you had sent your R code of how you
constructed the sab object.

If you have a data.frame, the subset command you are having trouble with
should work fine. See below.

# Working Example 
sab = data.frame(group=c('Group A', 'Group A', 'Group C', 'Group B', 'Group
C'), gender=c(1,1,1,2,2))
subset(sab, sab$group=='Group A') 

Perhaps your data is stored as a matrix? If so, the following code will fail
with the error message you experienced.

# Non Working Example
sab2 = matrix(c('Group A', 'Group A', 'Group C', 'Group B', 'Group
subset(sab2, sab2$group=='Group A') 


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