Set contrast weights for real EVs in fsl 1stlvl design

Hi all,

Currently I am trying to run a GLM that includes the derivatives of the EVs in some of the contrasts. When using the Feat GUI in FSL you can choose to set the contrast weights for real EVs rather than original EVs.However, with nipype I couldn’t find the option to do so. Is it possible to provide the weights of real EVs in, for example, fsl.model.level1Design?

Of course I could also just modify the design.con file before feeding it into the model, but that would be rather hacky and error-prone, so I would prefer it to be set up the proper way right away.


Sorry to push this again, but is there anyone who has done something similar or an idea how to?