[Octave-bug-tracker] [bug #29601] bugs in cubic and spline interpolation with interp2

[Søren Hauberg]

Follow-up Comment #5, bug #29601 (project octave):

Sorry about the late reply.

If memory serves me correct that code comes from the 'image' package where
interpolation is used when e.g. resizing images. When working with images you
can assume that XI and YI correspond to pixel coordinates and as such will be
constant in one direction and have a constant increment in the other
direction. This was essentially what the code in question was ensuring. This
check is, however, a bit too strong as the interpolation code does not require
(I think) the increment to be constant; the input just have to be
"meshgridded".

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