[R] sort table

[Claus Atzenbeck]

Hi,

I have a data frame named "questions" that I use to get a subset and
then a table:

failcondonly <- subset(questions, errorreason=="condition")
failcondtab <- table(failcondonly$type, failcondonly$qid, exclude=c("ORGA", "skipped"))

The failcondtab looks like this:

        6 11 12 13 14 15 17 26 30 31 39 41
gave up 0  1  1  1  1  0  0  0  0  8  0  2
wrong   3  3  7  3  3  1  4  1  3  4  1  2

I want to sort this table according to the *sum* of the values in "gave
up" and "wrong" in reverse order. The highest value should be first.
First would be column "31" (value 8+4=12), then column "12" (value
1+7=8), etc.

sort(failcondtab) does not help, since it sorts the column names, not
the sum of the values of each column.

Thanks for any hint.
Claus