Tue Jul 20 11:27:28 CDT 2010
On Tue, Jul 20, 2010 at 8:17 AM, <PHobson@geosyntec.com> wrote:
>> -----Original Message-----
>> From: email@example.com [mailto:firstname.lastname@example.org]
>> On Behalf Of Pierre GM
>> Sent: Monday, July 19, 2010 5:05 PM
>> To: SciPy Users List
>> Subject: Re: [SciPy-User] pylab
>> On Jul 19, 2010, at 7:59 PM, Benjamin Root wrote:
>> > Btw, I would avoid using None as an empty value. NaNs might be better.
>> Indeed, Ben, indeed. A None in a list as input of numpy.ma.array will
>> give your array a 'object' dtype, which will probably not be what you
>> numpy.nans are an option if you deal with floats, not if you deal with
>> But keep in mind that whatever value you choose can be masked: check the
>> masked_where function and similar, for example...
> Ben and Pierre,
> Thanks for the tips! Glad I chimed in here b/c I've definitely learned something. I'm often pulling data out from a database, so null records come back to me as None's. I'll be sure to set a CASE statement now that fills the NULLs in with an obviously junk value that I can mask from now on.
> SciPy-User mailing list
Why not user your None as said junk value?
More information about the SciPy-User