On Thu, Dec 1, 2011 at 12:26 PM, Benjamin Root <ben.r...@ou.edu> wrote:
> On Thu, Dec 1, 2011 at 10:52 AM, jonasr <jonas.rueb...@web.de> wrote:
>>
>>
>> Hi,
>> is there any possibility to define a numpy matrix, via a smaller given
>> matrix, i.e. in matlab
>> i can do this like
>>
>> a=[1 2 ; 3 4 ]
>>
>>
>> A=[a a ; a a ]
>>
>> so that i finally get
>>
>> A=[ [1,2,1,2]
>> [3,4,3,4]
>> [1,2,1,2]
>> [3,4,3,4]]
>>
>> i tried different things on numpy which didn't work
>> any ideas ?
>>
>> thank you
>>
>
> numpy.tile() might be what you are looking for.
or which is my favorite tile and repeat replacement
>>> a= np.array([[1, 2], [3, 4]])
>>> np.kron(np.ones((2,2)), a)
array([[ 1., 2., 1., 2.],
[ 3., 4., 3., 4.],
[ 1., 2., 1., 2.],
[ 3., 4., 3., 4.]])
>>> np.kron(a, np.ones((2,2)))
array([[ 1., 1., 2., 2.],
[ 1., 1., 2., 2.],
[ 3., 3., 4., 4.],
[ 3., 3., 4., 4.]])
Josef
>
> Cheers!
> Ben Root
>
>
> _______________________________________________
> NumPy-Discussion mailing list
> NumPy-Discussion@scipy.org
> http://mail.scipy.org/mailman/listinfo/numpy-discussion
>
_______________________________________________
NumPy-Discussion mailing list
NumPy-Discussion@scipy.org
http://mail.scipy.org/mailman/listinfo/numpy-discussion
