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Re: Re: Re: Windows PSPPIRE/PSPP is pretty wonky (Harry Thijssen)
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From: |
John Darrington |
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Subject: |
Re: Re: Re: Windows PSPPIRE/PSPP is pretty wonky (Harry Thijssen) |
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Date: |
Wed, 7 Jan 2015 19:53:20 +0100 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jan 07, 2015 at 07:36:04PM +0100, Harry Thijssen wrote:
> >
> > Regarding the 99999 issue, I certainly don't get that on GNU/Linux - my
> > guess is that
> > Windows has rounding issues and is miscalculating 300 as
> > 299.99999999999999 (the left
> > hand side is off the page).
> >
>
> Maybe it is possible to round it when used on the axis.
The question is, to what precision do we round it? That is a non-trivial
problem to solve in the general case.
Having looked at it for some time, I have concluded that the only real solution
it to do all the arithmetic relating to the axes in a decimal rather than a
binary floating point system.
I have the start of a patch somewhere which I will try to resurrect and get
working properly.
J'
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