I believe this is the SPSSX-L post Jon is referring to.

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Date: Thu, 2 Sep 2021 14:11:35 -0600

From: Jon Peck

Subject: Re: MATRIX producing a signed zero at saving?

Interesting.

The IEEE floating point standard accommodates a negative zero, but SPSS

Statistics would be following the implementation of the C/C++/Fortran

runtime library.

A negative floating point zero is represented by a zero mantissa and zero

exponent but a 1 sign bit. Negative and positive zeros compare equal

according to the standard and in SPSS. If you convert xy to a hex string,

both have the same representation. I have no idea why FREQUENCIES treats

the values as different, since other parts of Statistics don't, but I don't

see this as having any practical consequences.

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jkpeck wrote

I commented on this on the SPSS-X list, but, sadly, it does not appear on the Nabble version.

--

Bruce Weaver

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http://sites.google.com/a/lakeheadu.ca/bweaver/"When all else fails, RTFM."

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