Re: [Numpy-discussion] What is the sign of nan?

On Mon, Sep 29, 2008 at 3:52 PM, Charles R Harris <charlesr.harris@gmail.com

wrote:

Hi All,

I've been cleaning up the ufunc loops and the sign function currently doesn't have a defined behavior for nans. This makes the results depend on the order/type of comparisons in the code, which looks fragile to me. So what should it return? I vote for nan but am open for suggestions.

And while we're at it, lets decide how to treat max/min when nans are involved. Or should we just say the behavior is undefined. Chuck