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noframe
2009 Aug 12
1
inserting into data frame gives "invalid factor level, NAs generated"
...m calculating some values that I am inserting into a data frame. From
what I have read, creating the dataframe ahead of time is more efficient,
since rbind (so far the only solution I have found to appending to a data
frame) is not very fast.
What I am doing is the following:
# create data frame
goframe = data.frame(goA = character(10), goB = character(10), value =
numeric(10))
goframe[1,] = c("AA", "BB", 0.4)
Result is:
> goframe[1,] = c("AA", "BB", 0.4)
Warning messages:
1: In `[<-.factor`(`*tmp*`, iseq, value = "AA") :
invalid factor l...