When using 3dDeconvolve, whenever you have a vector composed entirely of 0's, the program gives the error that it cannot invert the matrix. Although these are typically vectors that we do not hope to analyze (due to the small number of trials going into them) we would nevertheless like to keep them in the model and it is inconvenient to write a separate 3dDeconvolve call and .mat files for cases in which there is a vector made up of all 0's. Is there a way to have 3dDeconvolve ignore these vectors without altering the .mat files?
Thanks.