It would be nice to see what OP wanted to end up with, but the link contained
input data to experiment with.
The first problem is that if you are not interested in working with the whole
set of columns then you need to only give a data frame with the columns you
want to work with:
dta.wide <-
Posting a few rows, say 5, of your data using dput() along with the result
that you would like to get for those rows would help get you a quicker and
more accurate response, I believe. This is as suggested by the posting
guide, linked below, which you should read if you have not already.
-- Bert
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