Is there a way to determine (or specify) the correspondence between the 
vertices when a cifti is converted to a "fake nifti" vs. separated to 
giftis?

For example, wb_command -cifti-separate Parcels_LR.dtseries.nii  COLUMN 
-metric CORTEX_LEFT out.func.gii produces a gifti with 32492 vertices, 
the first 10 of which have the values 1 2 3 4 5 6 7 0 8 9.

Converting the same cifti via wb_command -cifti-convert -to-nifti 
Parcels_LR.dtseries.nii out.nii.gz -smaller-file gives a file of 
dimension 29706, 2, 1, 1. 29706*2 = 59412, which is also the number of 
rows in the text file that is given by wb_command -cifti-convert 
-to-text Parcels_LR.dtseries.nii out.txt. The first 10 values of these 
files is 1  2  3  4  5  6  7  8  9 10, different than the gifti.

My guess is that the -cifti-convert output has fewer vertices than the 
-cifti-separate output because the medial wall is omitted. But is there 
a fixed ordering to how the 29706 cifti vertices fit into the 32492 
gifti vertices? (Rephrased, is it something like the vertex in row 
17,234 of the -cifti-convert -to-text file is always assigned to slot 
10,222 of the -cifti-separate gifti file?) If the reassignment is fixed, 
is it available somewhere?

thanks,
Jo



-- 
Joset A. Etzel, Ph.D.
Staff Scientist
Cognitive Control & Psychopathology Lab
Washington University in St. Louis
mvpa.blogspot.com
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