Dear list,
I'm trying to use the reshape package to perform a merging operation
on a list of data.frames as illustrated below,
a <- 1:10
example <- list( data.frame(a=a, b=sin(a)), data.frame(a=a,
b=cos(a)) )
melt(example, id = a)
this produces the desired result, where the data.frames have been
coerced into one with a common identifier variable "a". However, it
seems that if "a" is of mode numeric it is not recognized as an id
variable,
a <- as.numeric(1:10)
example <- list(data.frame(a=a, b=sin(a)), data.frame(a=a, b=cos(a)))
melt(example, id = a) # this does not use a as an id variable
I'm very new to the reshape package, any pointer would be greatly
appreciated. I first tried several combinations of merge, do.call,
sapply,... but without success.
Many thanks,
baptiste
_____________________________
Baptiste Auguié
School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK
Phone: +44 1392 264187
http://newton.ex.ac.uk/research/emag
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