Hi,
This should work.
One thing I have noticed in the past is that if you do not press return when entering the values into the GUI (e.g., setting the "Number" 11 just by typing 11 but not doing anything else) then it can end up using some default value that can cause problems). You can fix this by either pressing return, or to be extra sure use the up and down arrows to make sure that the number is set correctly.
So try that and see if this fixes your problem.
All the best,
Mark
> On 25 Jul 2017, at 12:09, Wiktor Olszowy <[log in to unmask]> wrote:
>
> Hello everyone,
>
> I struggle to use the FIR (finite impulse response) basis functions (one of the available HRF models). For the default values (3 functions, a total window of 15s) FSL does work. But when I try to change these values to 11 or 12 or 13 functions and a total window of 24s (with TR=2s), I always get the message:
>
> "Problem with processing the model: terminate called after throwing an instance of 'NEWMAT::IndexException' Aborted".
>
> I experience the same problem with most settings for scans with different TRs. If I understand it correctly, FIR should divide the total window (of the given length) into (number of basis functions) bins and calculate the mean activation for each bin. If the time series is long enough, this should be a straightforward procedure. Does anyone have experience with FIR in FSL and knows how it works?
>
> Best,
>
> Wiktor
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