[Octave-bug-tracker] [bug #46770] num2str produces different results in Octave and in Matlab

[Rik]

Follow-up Comment #4, bug #46770 (project octave):

There is another subtle difference.  Matlab is using a field width of 4.  You
can see that in the last column where there are two spaces between "5.55" and
"6.6".

A quick workaround in Octave is to use the specific format string that Matlab
must be using.


x = [1.1, 2.22, -3.3; 4.44, 5.55, 6.6];
fmt = '%4.16g ';
y = num2str(x, fmt)

y =

 1.1 2.22 -3.3
4.44 5.55  6.6


The underlying C libraries can't determine left/right justification if there
is no field width, because Octave also right justifies by default.  You can
see that by explicitly asking for left justification.


fmt = '%-4.16g ';
y = num2str(x, fmt)

y =

1.1  2.22 -3.3
4.44 5.55 6.6




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