[Octave-bug-tracker] [bug #36732] interp1 does not check input for monotonicity

[Michael Godfrey]

Follow-up Comment #30, bug #36732 (project octave):

I noticed an added feature of interp1 which appears
not to be documented:  The X vector is sorted before
the interpolation is done.  This surely added to
the confusion following the original bug report.

For now, I have put the tests for distinct and
duplicated values ahead of the sort.  But, it may
make sense, once users realize that X is sorted, to
put the test after the sort.

Anyhow, the tests now seem to work.


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