Thanks all. On Fri, Aug 6, 2010 at 9:42 AM, Stephen J. Fromm <[log in to unmask]> wrote: > Why do you think using double instead of float is that much more time consuming? (I do understand that a naive calculation says it takes twice as much time to write/read the data.) The naive calculations has proven to be correct :) > If you found the place in the code to turn off the deletion of the residuals, maybe you could find the place in the code where SPM uses double and change it to float? I ended up converting to float32 using fslmath. I prefer to change SPM code as little as possible (because it is hard to maintain your own version). BTW - can I make a feature request? Could saving residuals be an option I could set somewhere? This way I would not have to patch my SPM version each time there is a new release. Thanks! Chris