Re: [Numpy-discussion] how to check type of array?

2012-03-29 Thread Chao YUE 
thanks to all. more than what I need.

cheers,

chao

2012/3/29 Derek Homeier 

> On 29 Mar 2012, at 14:49, Robert Kern wrote:
>
> >> all work. For a more general check (e.g. if it is any type of integer),
> you can do
> >>
> >> np.issubclass_(a.dtype.type, np.integer)
> >
> > I don't recommend using that. Use np.issubdtype(a.dtype, np.integer)
> instead.
>
> Sorry, you're right, this works the same way - I had the impression from
> the documentation
> that tests like np.issubdtype(np.int16, np.integer) would not work, but
> they do.
>
> Cheers,
>Derek
>
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***
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UMR 1572 CEA-CNRS-UVSQ
Batiment 712 - Pe 119
91191 GIF Sur YVETTE Cedex
Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16

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Re: [Numpy-discussion] how to check type of array?

2012-03-29 Thread Derek Homeier 
On 29 Mar 2012, at 14:49, Robert Kern wrote:

>> all work. For a more general check (e.g. if it is any type of integer), you 
>> can do
>> 
>> np.issubclass_(a.dtype.type, np.integer)
> 
> I don't recommend using that. Use np.issubdtype(a.dtype, np.integer) instead.

Sorry, you're right, this works the same way - I had the impression from the 
documentation 
that tests like np.issubdtype(np.int16, np.integer) would not work, but they do.

Cheers,
Derek

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Re: [Numpy-discussion] how to check type of array?

2012-03-29 Thread Robert Kern 
On Thu, Mar 29, 2012 at 13:47, Derek Homeier
 wrote:
> On 29 Mar 2012, at 13:54, Chao YUE wrote:
>
>> how can I check type of array in if condition expression?
>>
>> In [75]: type(a)
>> Out[75]: 
>>
>> In [76]: a.dtype
>> Out[76]: dtype('int32')
>>
>> a.dtype=='int32'?
>
> this and
>
> a.dtype=='i4'
> a.dtype==np.int32
>
> all work. For a more general check (e.g. if it is any type of integer), you 
> can do
>
> np.issubclass_(a.dtype.type, np.integer)

I don't recommend using that. Use np.issubdtype(a.dtype, np.integer) instead.

-- 
Robert Kern
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Re: [Numpy-discussion] how to check type of array?

2012-03-29 Thread Derek Homeier 
On 29 Mar 2012, at 13:54, Chao YUE wrote:

> how can I check type of array in if condition expression?
> 
> In [75]: type(a)
> Out[75]: 
> 
> In [76]: a.dtype
> Out[76]: dtype('int32')
> 
> a.dtype=='int32'?

this and 

a.dtype=='i4'
a.dtype==np.int32

all work. For a more general check (e.g. if it is any type of integer), you can 
do

np.issubclass_(a.dtype.type, np.integer)

See also "help(np.subdtype)"

Cheers,
Derek

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Re: [Numpy-discussion] how to check type of array?

2012-03-29 Thread Olivier Delalleau 
if type(a) == numpy.ndarray:
   ...
if a.dtype == 'int32':
   ...

-=- Olivier

Le 29 mars 2012 07:54, Chao YUE  a écrit :

> Dear all,
>
> how can I check type of array in if condition expression?
>
> In [75]: type(a)
> Out[75]: 
>
> In [76]: a.dtype
> Out[76]: dtype('int32')
>
> a.dtype=='int32'?
>
> thanks!
>
> Chao
>
>
> --
>
> ***
> Chao YUE
> Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
> UMR 1572 CEA-CNRS-UVSQ
> Batiment 712 - Pe 119
> 91191 GIF Sur YVETTE Cedex
> Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
>
> 
>
>
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>
>
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[Numpy-discussion] how to check type of array?

2012-03-29 Thread Chao YUE 
Dear all,

how can I check type of array in if condition expression?

In [75]: type(a)
Out[75]: 

In [76]: a.dtype
Out[76]: dtype('int32')

a.dtype=='int32'?

thanks!

Chao


-- 
***
Chao YUE
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
Batiment 712 - Pe 119
91191 GIF Sur YVETTE Cedex
Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16

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