Error in running "AFQ_example.m"

[Zhongrui Huang]

Dear AFQ experts,

I have installed AFQ, spm8, and vistasoft on my Windows10 with MATLAB R2021a according to the installation instructions on https://github.com/yeatmanlab/AFQ/wiki. However, when I try to run 'AFQ_example.m', the following error is returned:

After checking by single step debugging, I have three questions:
1.The results fa from dtiComputeFA are NaN.

fa = dtiComputeFA(dt.dt6);   

2.The results eigVal from dtiEig is a near-zero matrix. So the fa is NaN.

[eigVec, eigVal] = dtiEig(eigVal);

3.There is only one volume in the tensors.nii(C:\Users\hzr\Desktop\CodefromOthers\AFQ\data\control_01\dti30\bin).  Maybe FA couldn't be computed from tensor which has one volume. 

How could I solve this problem? I would appreciate it if I could hear from you.

Yours,

ZhongruiHuang

[Maryana Daood]

Hello  ZhongruiHuang,

Were you able to solve this problem? 
I'm encountering the same problem when I run AFQ_example.m and also AFQ_run.m 
I don't think the problem is one volume, because when I try to run it on my data that has multiple volume, I encounter the same problem.
I would appreciate your insights on the matter.  

Thank you,
Maryana