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0006
2008 Feb 08
4
Subsetting a data.frame degenerates at one column?
...e result is no longer a data.frame. So, say I've got,
in data frame 'input'
disk1 disk2 disk3 disk4
T0000 0 1 0 4
T0001 0 1 0 5
T0002 0 1 0 5
T0003 0 2 0 4
T0004 0 2 0 3
T0005 0 1 0 3
T0006 0 0 0 3
and somewhere I've noted a list
targets <- c('disk2','disk3')
I can say
input[,targets]
disk2 disk3
T0000 1 0
T0001 1 0
T0002 1 0
T0003 2 0
T0004 2 0
T0005 1 0
T0006 0 0
but if
targe...