Handle n-dimensional data with views

[cbodenst]

If the data is more than 2-dimensional we have to find a way to create a view on the data that lets the array look 2-dimensional. This way we could easily use all algorithms that has been developed for 2-D data on n-D data.

[mricherzhagen]

thats easy, i think: af::moddims(array, array.dims(0) * array.dims(1), array.dims(2)) for 3D to 2D.

for 4D its then af::moddims(array, array.dims(0) * array.dims(1) * array.dims(2), array.dims(3))

[cbodenst]

moddims will copy the data

#include <arrayfire.h>

int main()
{
        af::array a = af::constant(1,4,3,2);
        af::array b = af::moddims(a, a.dims(0) * a.dims(1), a.dims(2));
        b *= 2;
        af_print(a);
        af_print(b);
}

will result in

a
[4 3 2 1]
    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 

    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 
    1.0000     1.0000     1.0000 

b
[12 2 1 1]
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 
    2.0000     2.0000 

[mricherzhagen]

But only if you modify them, i hope.