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Re: 3.0.2 release (mingw32 check)


From: John W. Eaton
Subject: Re: 3.0.2 release (mingw32 check)
Date: Tue, 26 Aug 2008 10:26:53 -0400

On 26-Aug-2008, Benjamin Lindner wrote:

| I can follow your argumentation, but why does (-i) have a real part of 
| (-0) and simultaneously (-1) has a imaginary part of (0) (without the 
| sign) ?

-1 is stored as a real number only.  There is no imaginary part.

| The above test expects mat2str([-1/3]) to result in "-0.3333+0i".
| Isn't this inconsistent?

Yes.

| 1/3 is represented as (1/3,0) and negating it should then yield 
| (-1/3,-0). This is what puzzled me about this test.

We do have pure real numbers.  1/3 is not stored as (1/3, 0).  It has
no imaginary part.

| It looks like an IEEE floating point feature to have -0 ?

Yes.

| Interestingly I cannot create a minus-zero on my system
| octave:1> -0
| ans = 0

That looks like a bug, but not in Octave.

jwe


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