A Quick Guide for DWI Connectivity

[AmirHussein Abdolalizadeh]

Hi all,

I am familiar with R, DWI analysis, and graph. I have 68*68 "fiber count" tractography matrices (by MRtrix) of my subjects based on FreeSurfer's cortical segmentation (derived from NetworkNeuro app on the BrainLife), and want to:

1. Import them in R

2. Normalize and Clean the data (removing counts less than a number)

3. Calculate Weight (e.g. divide fiber count to global count)

4. Do the analysis

Using the manual and this group, I couldn't find a piece-of-cake guide to do these actions, esp. the first part: how to import calculated connectivity matrices into R. As far as I understood, it can be done from the ProbtrackX/FreeSurfer results, but I have the connectivity matrices available in .csv files.

I will be glad to find a way to do so and make this issue as a guide.

Bests,

Amir

[Chris Watson]

Hi Amir, is there any way you can save the connectivity matrices as
".txt" files? That is, space- or tab-separated files instead of
comma-separated? The "create_mats" function is intended to do steps 1
and 2 above.

Chris

> --
> You received this message because you are subscribed to the Google Groups
> "brainGraph-help" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to brainGraph-he...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/brainGraph-help/e25b0757-ca9e-475f-baaf-c06bafec0ab5%40googlegroups.com.
>