R: How to replace elements of a data.frame?

Posted by John on Stack Overflow See other posts from Stack Overflow or by John
Published on 2010-05-04T16:47:06Z Indexed on 2010/05/04 17:28 UTC
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I'm trying to replace elements of a data.frame containing "#N/A" with "NULL", and I'm running into problems:

foo <- data.frame("day"= c(1, 3, 5, 7), "od" = c(0.1, "#N/A", 0.4, 0.8))

indices_of_NAs <- which(foo == "#N/A") 

replace(foo, indices_of_NAs, "NULL")

Error in [<-.data.frame(*tmp*, list, value = "NULL") : new columns would leave holes after existing columns

I think that the problem is that my index is treating the data.frame as a vector, but that the replace function is treating it differently somehow, but I'm not sure what the issue is?

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R: How to replace elements of a data.frame? - Developer IT

R: How to replace elements of a data.frame?

r

dataframe

replace

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