[Numpy-discussion] `allclose` vs `assert_allclose`

[Chris Barker]

On Fri, Jul 18, 2014 at 12:43 PM, Pauli Virtanen <pav at iki.fi> wrote:

> 18.07.2014 22:13, Chris Barker kirjoitti:
> [clip]
> > but an appropriate rtol would work there too. If only zero testing is
> > needed, then atol=0 makes sense as a default. (or maybe atol=eps)
>
> There's plenty of room below eps, but finfo(float).tiny ~ 3e-308 (or
> some big multiple) is also reasonable in the scale-freeness sense.


right! brain blip -- eps is the difference between 1 and then next larger
representable number, yes? So a long way away from smallest representable
number. So yes, zero or [something]e-308 -- making zero seem like a good
idea again....

is it totally ridiculous to have the default be dependent on dtype? float32
vs float64?

-Chris

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Christopher Barker, Ph.D.
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