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

[Francesco Potortì]

>Right!  Sorry about the confusion.  Distinct is
>correct.  And, the Manual is wrong.  So, the
>error test should be for distinct values of X
>and the manual should be corrected.

As far as I know, Matlab requires strictly monotonic values for X.  The
bug report claims that an error is generated in Matlab for

  interp1([1:5 4:9], 1:11, 4) 

Please, could someone with access to Matlab check whether this one
generates an error too?

  interp1([1:5 3.5:9], 1:11, 4) 

In this second test case X contains all distinct values, but they are
non-monotonic. 

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