Hi,
I think "intensity" is long name of your columns, it is not unique, so we can not create script according to it.
But if wavelenght is the first column and intersity are the 2nd, 3rd... columns, you can use scrpt as following
loop(i,2,4) {integ1 (col(1), col($(i))); };
If the scirpt does not met your requirment, would you mind to send us your data file and give detail requirment so that we can create specified script for your case.
Echo
OriginLab Corp