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help > RE: Leave one out
Jun 23, 2016 10:06 PM | Alfonso Nieto-Castanon - Boston University
RE: Leave one out
Hi David/Jeff/Thomas
Thanks for the feedback/suggestion, this is indeed part of the planned capabilities to be added to CONN but I do not have quite a target date for this yet. In the meantime, you may want to give the attached spm_crossvalidation utility a try. This basically works on any open SPM results window, so if you want to use this with CONN you would need to first use the 'Display SPM' button in the results explorer window. After that, you simply type spm_crossvalidation in Matlab's command window and that will run N analyses (each analysis removing one subject), and compute the suprathreshold mask for each of those analyses. If you specify where exactly you would want to extract contrast data from (e.g. averaging from all suprathreshold voxels) that will also extract from these masks, and from the corresponding out-of-sample subject in each case, contrast values within the suprathreshold masks for all defined contrasts.
Hope this helps
Alfonso
Originally posted by Thomas DeRamus:
Thanks for the feedback/suggestion, this is indeed part of the planned capabilities to be added to CONN but I do not have quite a target date for this yet. In the meantime, you may want to give the attached spm_crossvalidation utility a try. This basically works on any open SPM results window, so if you want to use this with CONN you would need to first use the 'Display SPM' button in the results explorer window. After that, you simply type spm_crossvalidation in Matlab's command window and that will run N analyses (each analysis removing one subject), and compute the suprathreshold mask for each of those analyses. If you specify where exactly you would want to extract contrast data from (e.g. averaging from all suprathreshold voxels) that will also extract from these masks, and from the corresponding out-of-sample subject in each case, contrast values within the suprathreshold masks for all defined contrasts.
Hope this helps
Alfonso
Originally posted by Thomas DeRamus:
As would I. I could see this maybe working by
setting up a batch that performs the analyses separately for each
of the subject sets-1 and then exporting the values that you're
interested in, but I imagine doing it that way would eat up space
really fast.
-Thomas
-Thomas
Threaded View
| Title | Author | Date |
|---|---|---|
| David White | May 18, 2016 | |
| Jeff Browndyke | Jan 10, 2019 | |
| Jeff Browndyke | May 18, 2016 | |
| Thomas DeRamus | May 18, 2016 | |
| Alfonso Nieto-Castanon | Jun 23, 2016 | |
| Jennifer Barredo | Aug 22, 2016 | |
| Jeff Browndyke | Dec 28, 2018 | |
| Helene Hopman | Nov 14, 2019 | |
| Yoonji Lee | Mar 3, 2022 | |