I have a table that consist of columns containing pre-test and post-test data. There n pre-test columns and an equal number of post-test columns. I have the columns sorted so that pre-test item 1 is next to post-test item 1 and so on for the remaining columns. What I would like to do is select the first 2 columns do some analysis that will result in a new variable, then take the next 2 columns and do some analysis that will result in a new variable for that item. So I will end up (using the Loop End Column Append) with 1 new variable (the pre-post analysis) for each item.
I essentially need what the Column List Loop Start node does but I need to select 2 columns at a time instead of 1. Is there a nested loop solution for this? Any ideas appreciated. Thanks,