[Octave-bug-tracker] [bug #40668] -NA is inconsistent with other operations on NA

[Mike Miller]

Follow-up Comment #8, bug #40668 (project octave):

I assume you are asking about unpatched Octave as we know it? That's what I
tested here.

I know almost nothing about R, but here is what I tried:


$ R
> fid = file ("foo.dat", "wb")
> writeBin (c (1, -1) * NA, fid)
> close (fid)

$ octave
>> fid = fopen ("foo.dat", "rb");
>> x = fread (fid, "double");
>> fclose (fid);
>> x
x =

   NaN
   NaN



So that's one direction. In the other direction:


$ octave
>> fid = fopen ("foo.dat", "wb");
>> fwrite (fid, [1, -1] * NA, "double");
>> fclose (fid);

$ R
> fid = file ("foo.dat", "rb")
> x = readBin (fid, double (), n = 2)
> close (fid)
> x
[1] NaN NaN


Is that what you are looking for? If not what can I test differently?

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