> I get the desired output, except i would like to add > a column in this table called "number of truefalse = > 1" > > which would tell me how many combinations had the > value 1 for that column in the original table. Any > minor changes to the code that I can make? "Combinations"?? of what? (Do you mean "combinations" in the statistical sense, e.g. how many ways can I choose 5 objects out of 7?) Does truefalse or these "combinations" have anything to do with your missings? ... View more