Error using nearpoints: First arg must be a real 3xM array.

[yanbin-niu]

Hi,

Hope all is well!

I am trying to use AFQ on the tractography generated by Mrtrix. I am stuck in an issue that I do not understand well:

Error using nearpoints
First arg must be a real 3xM array.

Error in dtiIntersectFibersWithRoi (line 156)
[~, bestSqDist{ii}] = nearpoints(fc', roiCoords{ii}');

Error in dtiSplitInterhemisphericFibers (line 67)
[fgToChop,contentiousFibers, keep] = dtiIntersectFibersWithRoi([], {'and'}, [], roi, fg);

Error in AFQ_SegmentFiberGroups (line 206)
fg = dtiSplitInterhemisphericFibers(fg, dt, -10);

The size(fc') is 3x854991991, and size(roiCoords{ii}') is 3x2590. So, I am clueless on why they are not a 3*M array. Please pardon me if this question is very basic.

Any thoughts/advice would be much appreciated! Thank you!!

Best,
Yanbin

[yanbin-niu]

It seems that the nearpoints need inputs to be double, and the problem should be solved here (convert the single to double for inputs).