Short background: I have a number of texts that are being grouped regarding their value (about 5 differing values for each variable) for number of variables; meaning that each texts appears in one value group of each variable. (group A might be text1, text7, text23, text38; etc.)
Goal: I want to compare each of these primary groups regarding any overlap of their contained items using one group as a basis; i.e. I take group A and check which texts of this group also appear in any group of another variable (of course, I am not comparing groups that belong to the same variable, since there would oviously be no overlap). In the end, I'd like to say that e.g. Text 1, 7, 23 and 38 all appear in groups A, F, J, K and so forth.
That means I do not want to compare the means or any values of the data groups, but want to know which groups share which items.
Since I am not yet that experienced yet, I can't seem to find the right code to start with; any ideas about how to tackle this task?