[Numpy-discussion] Singular Matrix problem with Matplitlib in Numpy (Windows - AMD64)
Andrew Straw
strawman@astraw....
Fri Jan 16 12:38:01 CST 2009
John Hunter wrote:
> Andrew, since you are the original author of the isnan port, could you
> patch the branch and the trunk to take care of this?
Done in r6791 and r6792.
Sorry for the trouble.
Now I just hope we don't get a problem with "long long", although now if
_ISOC99_SOURCE is defined, we'll preferentially use "int64_t" out of
<stdint.h>, so I should think this is more portable on sane platforms.
This one of many reasons why I stick to Python...
-Andrew
>
> JDH
>
> On Fri, Jan 16, 2009 at 8:07 AM, George <gwg@emss.co.za> wrote:
>> Hello.
>>
>> I am terribly sorry. I was mistaken last night. I had the latest Matplotlib
>> version 0.98.5.2 and I thought the bug was fixed but it hasn't. Let me explain.
>>
>> In the file MPL_isnan.h line 26 there is a declaration:
>>
>> typedef long int MPL_Int64
>>
>> This is fine for Linux 64-bit, but NOT for Windows XP 64-bit! For Windows the
>> declaration should be:
>>
>> typedef long long MPL_Int64
>>
>> This bug has caused me a LOT of late nights and last night was one of them. The
>> declaration is correct for Linux 64-bit and I guess Matplotlib was developed on
>> Linux because of this declaration. That is also why I thought the bug was fixed
>> but this morning I realised that I was looking at the wrong console.
>>
>> So, in summary. For Matplotlib 0.98.5.2 and Numpy 1.2.1 to work without any
>> problems. This means compiling and using Numpy and Matplotlib on Windows XP
>> 64-bit using AMD 64-bit compile environment, change line 26 in the file
>> MPL_isnan.h from long int to long long.\
>>
>> I also previously suggested switching MKL and ACML etc. but with this change
>> everything is fine. One can choose any math library and it works.
>>
>> Writing a small test application using sizeof on different platforms highlights
>> the problem.
>>
>> Thanks.
>>
>> George.
>>
>>
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>
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