[R] how does a valid subscript can produce an "subscript out of bounds" error?

[Witold E Wolski]

how does a valid subscript (see first 2 lines) can produce an
"subscript out of bounds" error (see line 4)?


1> sum(!rownames(msexp$rt) %in% msexp$pepinfo$transition_group_id)
[1] 0
2> sum(!msexp$pepinfo$transition_group_id %in% rownames(msexp$rt))
[1] 0
3> class(msexp$rt)
[1] "matrix"
4> msexp$rt = as.matrix(msexp$rt[msexp$pepinfo$transition_group_id,])
Error in msexp$rt[msexp$pepinfo$transition_group_id, ] :
  subscript out of bounds
>

-- 
Witold Eryk Wolski