I have two columns of integers (along with a bunch of other columns), and would like to overlay in Graph Builder on the pairing of the two --
Since overlay only accepts a single variable, I typically do this by creating a new column with both columns comma-separated by using the "New Formula Column" -> "Character" -> "Concatenate with comma", but when both columns are numeric, concatenating with comma is no longer an option, requiring a custom formula with char() and "||".
Request adding a "Concatenate with comma" option to "New Formula Column" -> "Combine" menu.