[Octave-bug-tracker] [bug #62947] nextpow2 gives incorrect result for 0.5 <= x < 1

[John W. Eaton]

Follow-up Comment #6, bug #62947 (project octave):

I'd just note that for the original code with


if (f == 0.5)
  n = n - 1;
endif


is not the same as


n(f == 0.5)--


unless the input X is a scalar.  For example, for X = [NaN, Inf, 3, 56, 64],
the original code returned [0, 0, 2, 6, 7] but with logical indexing instead
of the incorrect IF statement, the result is [0, 0, 6, 6].

So the original made the mistake of thinking in scalar terms.


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