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I have some output from a tapply call that looks like
1 2 4
678.2 19.3 716.2
and I want to make it into a data frame that looks like
key value
1 1 678.2
2 2 19.3
3 4 716.2
how can I do this?
Some example code would be nice, to see exactly what you’re doing. To answer your question narrowly, if
xis the result of yourtapply, thenMore broadly, see
?byand?aggregate, and also packageplyrfor more general data-wrangling needs.