The problem was that my formula had 2 "~" in it. It also had a lot of
duplicate terms, but by themselves they don't cause trouble.
Ross
On 4/4/2013 5:30 PM, Ross Boylan wrote:
Over a decade ago there was a problem with model.frame when the
variable names were long:
https://stat.ethz.ch/piperma
When I have a matrix MMM with long column names and short row names, then I
will normally display the transpose t(MMM). It will be much easier to read.
I will also set the emacs window holding *R* to very wide (150 or so) and
then I can see
the whole width of the transposed matrix simultaneously.
Over a decade ago there was a problem with model.frame when the variable
names were long:
https://stat.ethz.ch/pipermail/r-help/2002-August/024492.html
I have similar symptoms with R 2.15.3 on Windows 7:
Browse[2]> x <- model.matrix(formula(myform), p$data)
Error in model.frame.default(object,
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