Daren Tan wrote:
>
>
> I forgot the reshape equivalent for converting from wide to long format.
> Can someone help as my matrix is very big. The following is just an
> example.
>
>> m <- matrix(1:20, nrow=4, dimnames=list(LETTERS[1:4], letters[1:5]))
>
Gabor's solution is uses more basic functions, but package reshape or
function reshape(...direction="long") would also work
library(reshape)
m <- matrix(1:20, nrow=4, dimnames=list(LETTERS[1:4], letters[1:5]))
mdf = cbind(V1=rownames(m),as.data.frame(m))
melt(mdf)
Dieter
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