[Octave-bug-tracker] [bug #64361] sinc() return NaN on sinc(-1:0.20:1-0.20) expression

[Rik]

Follow-up Comment #25, bug #64361 (project octave):

Okay, with the specified compilation flags I can reproduce this behavior.

Minimal example is now


format longe
x = (-1:0.2:0.8)
x - 0


There is definitely a difference between the code that uses indexing (no for
loop) and the code that uses looping (array_value).  Simplest way to see that
is


x(6) == 0
ans = 1
[x](6) == 0
ans = 0


Besides elem() and array_value(), there is another function signature that
accepts an index vector.


Array<T> index (const idx_vector& idx)


It has similar code to elem() and also behaves similarly as shown below.


x([5 6 7]) == 0
ans =

  0  1  0





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