[Octave-bug-tracker] [bug #56609] rand(n) accepts non-integral (n)

[Rik]

Update of bug #56609 (project octave):

                  Status:                    None => Confirmed              
                 Release:                   5.1.0 => dev                    

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Follow-up Comment #1:

Matlab used to be quite loose about input validation and so Octave copied that
behavior for rand.  Also note that this looseness is only present when there
is a single dimension argument.  If more than one dimension is specified then
they must all be non-negative integers.  For example,


rand (1.5, 3)
error: rand: conversion of 1.5 to int64_t value failed


The code to change is in rand.cc at line 171.


else if (tmp.is_scalar_type ())
  {
    double dval = tmp.double_value ();

    if (octave::math::isnan (dval))
      error ("%s: NaN is invalid matrix dimension", fcn);

    dims.resize (2);

    dims(0) = dims(1) = octave::math::nint_big (dval);

    goto gen_matrix;
  }





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