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help > RE: Limiting gPPI analysis to ROIs only.
Aug 11, 2015 04:08 AM | Luke Hearne
RE: Limiting gPPI analysis to ROIs only.
Originally posted by Donald McLaren:
Hi Donald,
Thank you for the reply. I'll let you know how it goes.
There may be a work around for this issue that
is already built into the code.
Can you try the following steps:
(1) Create a new 4D file that only contains your 20 ROIs as 20 "voxels";
(2) Estimate the SPM model using the new data;
(3) Add the following to your parameter structure:
P.FSFAST=1;
P.FSFAST_source=[SPM.mat filename and path to original data];
(4) Run the PPPI commands
This will extract the seed values from the original dataset and then compute the PPI models on the reduced dataset.
NOTE: I have not tested the order of operations to see if averaging --> estimating is different than estimating --> averaging are different.
Let me know if you have any questions.
Can you try the following steps:
(1) Create a new 4D file that only contains your 20 ROIs as 20 "voxels";
(2) Estimate the SPM model using the new data;
(3) Add the following to your parameter structure:
P.FSFAST=1;
P.FSFAST_source=[SPM.mat filename and path to original data];
(4) Run the PPPI commands
This will extract the seed values from the original dataset and then compute the PPI models on the reduced dataset.
NOTE: I have not tested the order of operations to see if averaging --> estimating is different than estimating --> averaging are different.
Let me know if you have any questions.
Hi Donald,
Thank you for the reply. I'll let you know how it goes.
Threaded View
Title | Author | Date |
---|---|---|
Luke Hearne | Aug 10, 2015 | |
Donald McLaren | Aug 10, 2015 | |
Luke Hearne | Aug 11, 2015 | |