[R] Combinations of values in two columns
thomas.chesney at nottingham.ac.uk
Fri Nov 1 10:32:09 CET 2013
I have data that looks like this:
And I'd like to generate some more rows and another column. In the new
column I'd like to add a 1 beside all the existing rows. That bit's
Then I'd like to add rows for all the possible directed combinations
of rows not included in the existing data. So for the above I think
that would be:
and then put a 0 in the column beside these.
Can anyone suggest how to do this?
I'm using R version 2.15.3.
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