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logeffect
2005 Jun 29
2
quick way to construct formula
Dear R users,
I have a data with 1000 variables named "x1", "x2", ..., "x1000", and
I want to construct a formula like this format:
~x1+x2+...+x1000+x1:x2+x1:x3+x999:x1000+log(x1)+...+log(x1000)
That is: the base variables followed by all interaction terms and all
base feature log-transformations. I know I can use several paste
functions to construct it. But is