Hi Clive - So you are talking about the overall tract stats, averaged over the whole tract (and not the stats by position on the tract that trac-all -stat outputs). That phrase in the tutorial is not very clear - these could be used as a covariate in mri_glmfit, but the main input of mri_glmfit is on a surface or volume. These stats (e.g., average FA of the uncinate fasciculus) are only one value per subject.
Hope this helps,
a.y
On Tue, 11 Feb 2014, Clive Wong wrote:
Thanks Anastasia. I ask that because in the tracula stat page, it saids "Measures can be extracted from these files to be
analyzed further, e.g., for tract-based group analysis. Specifically, the text files can be converted into a table using
the command tractstats2table and then used for doing GLM analyses with mri_glmfit or any other statistical software (SPSS,
Excel, Statview etc.)". So I think I may reuse the GLM matrix.
Best,
Clive
On Tue, Feb 11, 2014 at 8:29 AM, Anastasia Yendiki <ayendiki@nmr.mgh.harvard.edu> wrote:
Hi Clive - These are not stats in the volume or on the surface, so mri_glmfit doesn't apply. If you want to do
group analyses along a tract on a table produced by trac-all -stat, you should import the table in any
software that you use for statistics (matlab, SPSS, etc).
Best,
a.y
On Mon, 10 Feb 2014, Clive Wong wrote:
Dear Anastasia,
Thanks very much. I have already downloaded the file. The wiki page was also down a few hours ago,
but it's ok now.
And I am interested in the tracula group stat. How could I use mri_glmfit on the text file? And
can I use the QDEC (or the
contrast generated by QDEC) to do the glm?
Thanks
Clive
On Mon, Feb 10, 2014 at 6:13 AM, Anastasia Yendiki <ayendiki@nmr.mgh.harvard.edu> wrote:
Hi Clive - Yes, you can use the recent tracula update on top your already processed data.
The new update only
adds new functionality to trac-all, without changing any of the existing functionality in
5.3.
Did you try downloading the update from here?
http://surfer.nmr.mgh.harvard.edu/fswiki/Tracula#Updates
a.y
On Sun, 9 Feb 2014, Clive Wong wrote:
Hi,
I just want to confirm, is that I can use the new trac-all with the data
processed in the original FS5.3 trac-all?
And, I just want to download the new trac-all, but I have problem to connect
to the ftp server. I can login to the server, but it does not response to
any command. Please advise.
Best,
Clive
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