Along tract analysis after tract segmentation

Dear MRtrix3 team,

I am performing an along-tract-analysis on a segmented tract in .tck format by using MRtrix3’s commands tckresample and tcksample.
More specifically, I am following the procedure described in the previous post by means of the following examples:

tckresample CST.tck -line 20 1,2,3 4,5,10 CST_samples.tck

and

tcksample TCK_samples.tck fa.mif fa_values.txt

In my case, I would like to indicate the ‘start’ and ‘end’ coordinates required as argument by the -line option of the tckresample command in such a way that the resampling procedure covers the whole tract. In other words, I would like to perform my along-tract-analysis along all my tract (not just for a specific segment, e.g. not for an intermediate part of my tract).

I have extracted the coordinates of each streamline’s endpoints. Which would be the most reasonable approach to choose the coordinates to indicate as ‘start’ and ‘end’ for the -line option in this case?

Looking forward to know your opinion, thank you in advance for your attention.
Best,
Lisa