AFNI version info (afni -ver
):
Precompiled binary macos_10.12_local: May 8 2023 (Version AFNI_23.1.05 'Publius Helvius Pertinax')
Hi,
I am working with EPI data corresponding to 10 minute runs. Every run corresponds to a 8 minute video that is preceded and followed by a 1 min blank. EPI volumes are acquired every 2 seconds . Every run is,
30 volumes (blank) + 240 volumes (video) + 30 volumes (blank) = 300 volumes,10 mins
I also have a continuous regressor that is a property of the video and has one measurement corresponding to every 2 seconds of video . Can you please help with the correct way to set up the timing 1D file for the video type condition that is ON for 240 volumes in a 300 volume run. Also, the correct way to specify a timing file for the continuous regressor that has 240 numbers corresponding to 240 volumes acquired during video presentation.
A session for example has 13 runs where one of 5 types of videos was shown in each run, eg; {1,2,3,4,5,1,2,3,4,5,1,3,4}
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I want to make a stimulus timing file for each of the 5 video types, so 5 1D files with 13 rows.
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I also want to make a stimulus timing file that specifies the parametric regressor vector, it will be nice if this can also be a single file with 13 rows.
Then I can these timing flies into afni_proc.py in the -regress_stim_times
field. It is not clear to me how to specify video onset and duration per run for video type condition and how to specify volume wise regressor value and duration (2 seconds) in a way that I can have a single 1D file for the parametric regressor also.
Best regards,
Harish