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Sam Steingold <email@example.com> writes:
> I am having a *very* nasty problem. I want all my floats to be double.
> Always. I set *default-float-format* to 'double-float, *and* set the
> vars as 0.0d0. And still end up with numbers like 644151.75f0.
When you read floats from files, you also need to have
*read-default-float-format* = double-float.
> This can be traced to
> > (+ 0.0d0 1233456.2345f0)
> which is quite outrageous, since *I* would expect it to be double on
> the grounds of double + single = double no matter what! :-)
This is a different issue: Once your data is already infected with
single-floats, does this disease spread or not? In ANSI CL compliant
systems, the double-floats take over again but inaccuracies spread
nevertheless under cover. In CLISP, with the rule "double + single = single",
the single-floats spread, so it's easier for you to detect them.
For more explanations, see section 12.1. of
- From: firstname.lastname@example.org