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Why perfcurve does not return a consistent result?

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Zeynab Mousavikhamene
Zeynab Mousavikhamene on 8 Jun 2020
when I run the perfcurve function like this:
[X,Y,T,AUC] = perfcurve(labels,scores,posclass)
some times the length of X, Y and T =length(labels)+1 and some times they are equal.
Why this happnes? I expect the lengths to be equal.
I need to make the output X, Y and T to be consistant (either equal or +1). Any idea how to do that?

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