It uses the default parameters:
   tau1 = 1;
   tau2 = 1;
   ttp1 = 5*tau1;  % 6 %
   ttp2 = 15*tau1; % 16 %
   c  = 1/6;



On 6/1/2022 4:27 AM, Laura Doll wrote:
>          External Email - Use Caution
>
> Hi Doug,
>
> Thanks for your hint where to find the actual function.
> But how can I find which values were used in my analysis? I.e. the input to 
> this function?
>
> Best,
> Laura
>
> Am Dienstag, 31. Mai 2022 17:19 CEST, "Douglas N. Greve" 
> <dgr...@mgh.harvard.edu> schrieb:
>   
>> Look here $FREESURFER/fsfast/toolbox/fast_spmhrf.m
>>
>> On 5/25/2022 9:19 AM, Laura Doll wrote:
>>>           External Email - Use Caution
>>>
>>> Hi everyone,
>>>
>>> I need some help regarding the SPM-HRF with two derivatives:
>>> Where can I find the actual function that was used for the analysis? I am 
>>> mostly interested in the peak latency, but would also appreciate if I can 
>>> check the other parameters of the function somewhere.
>>>
>>> Best,
>>> Laura
>>>
>>>
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