I thought it might be useful to add that the initial .w file is thresholded and 
does not contain values for all cerebral cortical regions.
Thank you very much,
Xavier.
________________________________________
From: hcp-users-boun...@humanconnectome.org 
[hcp-users-boun...@humanconnectome.org] on behalf of Xavier Guell Paradis 
[xavie...@mit.edu]
Sent: Tuesday, September 12, 2017 2:05 PM
To: hcp-users@humanconnectome.org
Subject: [HCP-Users] Resampling freesurfer-HCP

Dear HCP experts,
I have an overlay freesurfer file (format is .w) which corresponds to a task 
activity surface map (group result). I have one .w file for each cerebral 
hemisphere. I would like to visualize these maps using wb_view, and have tried 
to follow the instructions you published 
(https://wiki.humanconnectome.org/display/PublicData/HCP+Users+FAQ#HCPUsersFAQ-9.HowdoImapdatabetweenFreeSurferandHCP?).
As a first step I would need to convert the .w files into .func.gii files using 
mris_convert. Then I would use wb_command -metric-resample, as indicated in 
your instructions. This does not seem to work with my .w file:

1) mris_convert myfile.w myfile.func.gii
This generates myfile.func.gii, but when I use wb_command -metric-resample I 
get the following error:
ERROR: Parse error while reading: error occurred while parsing element, line 
number: 1 column number: 1

2) As an alternative approach, I opened myfile.w using Tksurfer and saved the 
overlay (myfile.w) with .mgh format (generating a new file: "myfile.mgh"). Then 
I do the following:
mris_convert myfile.mgh myfile.func.gii
This generates the myfile.func.gii file, but when I use wb_command 
-metric-resample with this file I get a different error:
ERROR: All data arrays (columns) in the file must have the same number of rows. 
 The first array (column) contains 163842 rows.  Array 2 contains 327680 rows.

Thank you very much for your help,
Xavier.

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