[Numpy-discussion] fortran representation

[Stefan van der Walt]

On Thu, May 31, 2007 at 12:07:09PM +0200, lorenzo bolla wrote:
> If I have an array1D (obtained reading a stream of numbers with numpy.fromfile)
> like that:
>  
> In [150]: data
> Out[150]: array([ 2.,  3.,  4.,  3.,  4.,  5.,  4.,  5.,  6.,  5.,  6.,  7.],
> dtype=float32)
>  
> I want it to be considered as "Fortran ordered", so that when I do:
>  
> In [151]: data.shape = (3,4)
>  
> I want to get:
>  
> array([[ 2.,  3.,  4.,  5.],
>        [ 3.,  4.,  5.,  6.],
>        [ 4.,  5.,  6.,  7.]], dtype=float32)

In [42]: x = N.array([2.,  3.,  4.,  3.,  4.,  5.,  4.,  5.,  6.,  5.,  6.,  7.])

In [43]: x.reshape((3,4),order='F')
Out[43]: 
array([[ 2.,  3.,  4.,  5.],
       [ 3.,  4.,  5.,  6.],
       [ 4.,  5.,  6.,  7.]])

Cheers
Stéfan