Hello Matt, Is this 1D or 2D data you are talking about? And raw data or reduced data? There is a tool in SasView which will let you do what you want with two already reduced datasets, but one subtraction at a time. In truth, what you want to do is not what SasView was designed for. That should be something the data reduction software at whichever facility you collected the data can sort out for you. Have you talked to your local contact. Otherwise, packages that might meet your needs are DAWN and Mantid which are python-based and can be scripted. Possibly Irena and FIT2D also. Kind regards, Steve King (for the development team) From: users <users-bounces@lists.sasview.org> On Behalf Of Greenborg Sent: 15 November 2018 07:08 To: users@sasview.org Subject: [SasView Users] Background subtraction with multiple datasets Hello all, I have a large number (thousands) of SAXS patterns from a kinetics study which I would like to perform solvent background subtraction on, I was wondering if there is an easy way to implement this data operation for a large number of patterns all at once which all have the same background which needs to be subtracted? The background is simply reaction solvent recorded over the same q range. Many thanks, Matt Greenberg