I knew that the "NA's" in my data were the root cause of the trouble, but did
not find out how to get rid of them. Untill I found your another post
mentioning to use 'na.omit' to remove the lines containing 'NA's" and the
problem got fixed after that.
Thanks for the help and all the trouble you hav
Hi:
It's hard to diagnose the problem without an illustrative example. Perhaps
the following might help:
(1) When writing a function to use in ddply(), make a generic data frame the
input argument
to the function and refer to the variables within the function either
with the $ notation
Hello all,
I have arranged my data as per Dennis's suggestion in this post
http://www.mail-archive.com/r-help@r-project.org/msg107156.html.
the posted code works fine but when I try to apply it to my data, i get ">
u2 <- ddply(xxm, .(plateid, cytokine), as.data.frame.function(f))
Error in t.test.f
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