Hey guys,
I think I figured out the problem, well, sorta, I downloaded everything on
my ubuntu server, and everything worked fine and dandy, the problem seem to
ve when I was running on my windows machine.
That's odd
Its on win32 and python 2.7
Greets
On Sat, Nov 17, 2012 at 3:43 AM, Jake Vanderplas <
[email protected]> wrote:
> If npy files do in fact work cross-platform, then I'm baffled. Any
> ideas about what could be causing these NaNs in Leon's script? The files
> on the website haven't been modified since they were put online.
>
> Here's a more compact version of the NaN checking:
>
> >>> import numpy as np
> >>> data = np.load('sdss_photoz.npy')
> >>> np.sum([np.isnan(data[col]) for col in data.dtype.names])
> 0
>
> Leon, what version of numpy are you using?
> Jake
>
>
>
> On 11/16/2012 08:22 AM, Nelle Varoquaux wrote:
>
>
>
>
> On 16 November 2012 17:14, Robert Kern <[email protected]> wrote:
>
>> On Fri, Nov 16, 2012 at 4:03 PM, Nelle Varoquaux
>> <[email protected]> wrote:
>> >> Hi Leon,
>> >> When I run your script, I get no instances of NaN in the data.
>> >>
>> >> I wonder if it's a problem with storing the data as a npy file. I
>> asked
>> >> around last spring and everybody seemed to think that the format is
>> >> compatible across platforms and numpy versions, but I may be wrong.
>> Does
>> >> anybody know?
>> >
>> > I think numpy relies on pickle for those. These are plateform dependant
>> > (32bits vers 64bits), and python version dependant. Pickle is not a
>> safe way
>> > to store data, thought I never had problems on my personal computers.
>> > Saving as txt is more reliable.
>>
>> The NPY file format only uses pickle for object arrays, which this
>> isn't. Otherwise, it records floats in standard IEEE-754 binary format
>> with enough header information to reconstruct it portably across
>> platforms. I see no NaNs, myself.
>>
>
> OK. Good to know :)
>
> Cheers,
> N
>
>
>>
>> --
>> Robert Kern
>>
>>
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>
>
>
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--
Leon Palafox, M.Sc
PhD Candidate
Iba Laboratory
+81-3-5841-8436
University of Tokyo
Tokyo, Japan.
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