Hello,
I have recently run a set of probtrackx using a single mask and several classification targets. I then used proj_thresh to threshold the output, then find the mean proportion of connection to each target. My question lies in the interpretation of these results. Since proj_thresh expresses the number of samples to each target as a proportion of total number of samples to any target, would one assume that summing the mean proportions of each target will be approximately equal to one? This is indeed the case for most of my subjects; there are however, a couple of subjects that these means sum to greater than one (i.e. ranging from 1.2 to 1.5). Am I incorrect in interpreting how proj_thresh works and do not need to be concerned about these values, or does this indicate an error in these couple of subjects?
Thanks in advance for any help provided.
J
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