Hi,
On Tue, Oct 8, 2013 at 12:44 PM, Matthew Brett wrote:
> Hi,
>
> On Tue, Oct 8, 2013 at 4:38 AM, Ke Sun wrote:
>> On Tue, Oct 08, 2013 at 01:49:14AM -0700, Matthew Brett wrote:
>>> Hi,
>>>
>>> On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
>>> > Dear all,
>>> >
>>> > I have written the follow
Hi,
On Tue, Oct 8, 2013 at 4:38 AM, Ke Sun wrote:
> On Tue, Oct 08, 2013 at 01:49:14AM -0700, Matthew Brett wrote:
>> Hi,
>>
>> On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
>> > Dear all,
>> >
>> > I have written the following function to compute the square distances of a
>> > large
>> > matri
* Richard Hattersley [2013-10-08]:
> On 8 October 2013 19:56, Valentin Haenel wrote:
>
> > I ended up using: PyArray_TypeObjectFromType
> > from cython so:
> >
> > np.dtype(cnp.PyArray_TypeObjectFromType(self.ndtype)).str
> >
> > Maybe i can avoid the np.dtype call, when using PyArray_Descr?
> >
On 8 October 2013 19:56, Valentin Haenel wrote:
> I ended up using: PyArray_TypeObjectFromType
> from cython so:
>
> np.dtype(cnp.PyArray_TypeObjectFromType(self.ndtype)).str
>
> Maybe i can avoid the np.dtype call, when using PyArray_Descr?
>
In short: yes.
`PyArray_TypeObjectFromType` first u
Hi Bernard,
Looks like you're on to something - two other people have raised this
discrepancy before: https://github.com/numpy/numpy/issues/2588.
Unfortunately, when it comes to resolving the discrepancy one of the
previous comments takes the opposite view. Namely, that the docstring is
correct an
Hi Richard,
* Richard Hattersley [2013-10-08]:
> On 8 October 2013 13:23, Valentin Haenel wrote:
>
> > Certain functions, like
> > `PyArray_SimpleNewFromData` `PyArray_SimpleNew` take a typeenum
> > Is there any way to go from typeenum to something that can be
> > passed to the dtype constructo
Hi Valentin,
On 8 October 2013 13:23, Valentin Haenel wrote:
> Certain functions, like
> `PyArray_SimpleNewFromData` `PyArray_SimpleNew` take a typeenum
> Is there any way to go from typeenum to something that can be
> passed to the dtype constructor, like mapping 12 -> '
If you just want the c
On Tue, Oct 8, 2013 at 4:38 AM, Ke Sun wrote:
> On Tue, Oct 08, 2013 at 01:49:14AM -0700, Matthew Brett wrote:
> > Hi,
> >
> > On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
> > > Dear all,
> > >
> > > I have written the following function to compute the square distances
> of a large
> > > matrix
Hello,
I am having trouble with solving line intersection problem. I would solve it
using standard functions which may already exist in Python library.
Let me explain it below:
I have sets of lines A(x,y) and B(x,y) and one map as a matrix form, also with
its resolution dx, dy which can be cha
On Tue, Oct 8, 2013 at 1:38 PM, Ke Sun wrote:
>
> > On a machine I had access to it took about 20 minutes.
> How? I am using matrix multiplication (the same code as
> http://stackoverflow.com/a/4856692) and it runs for around 18 hours.
>
>
make sure you are using an optimized BLAS library.
e.g. w
Hi,
I have a quick question about typenum. Certain functions, like
`PyArray_SimpleNewFromData` `PyArray_SimpleNew` take a typeenum
argument. Is there any way to go from typeenum to something that can be
passed to the dtype constructor, like mapping 12 -> 'http://mail.scipy.org/mailman/listinfo/nu
On Tue, Oct 08, 2013 at 01:49:14AM -0700, Matthew Brett wrote:
> Hi,
>
> On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
> > Dear all,
> >
> > I have written the following function to compute the square distances of a
> > large
> > matrix (each sample a row). It compute row by row and print the ov
> Out of interest, how did you do this with matrix multiplication?
http://stackoverflow.com/a/4856692
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On 08/10/13 09:49, Matthew Brett wrote:
> On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
>> >Dear all,
>> >
>> >I have written the following function to compute the square distances of a
>> >large
>> >matrix (each sample a row). It compute row by row and print the overall
>> >progress.
>> >The pr
On 08/10/13 09:06, Ke Sun wrote:
> I give as input a 70,000x800 matrix. The output should be a 70,000x70,000
> matrix. The program runs really slow (16 hours for 1/3 progress). And it eats
> 36G memory (fortunately I have enough).
At this stage I'd be asking myself what I'm trying to achieve and w
your computation is symmetric so you only need to compute the upper or
lower triangle which will save both memory and time.
On Tue, Oct 8, 2013 at 10:06 AM, Ke Sun wrote:
> Dear all,
>
> I have written the following function to compute the square distances of a
> large
> matrix (each sample a r
Hi,
On Tue, Oct 8, 2013 at 1:06 AM, Ke Sun wrote:
> Dear all,
>
> I have written the following function to compute the square distances of a
> large
> matrix (each sample a row). It compute row by row and print the overall
> progress.
> The progress output is important and I didn't use matrix m
Dear all,
I have written the following function to compute the square distances of a large
matrix (each sample a row). It compute row by row and print the overall
progress.
The progress output is important and I didn't use matrix multiplication.
I give as input a 70,000x800 matrix. The output sh
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