Views

A subscripted MfArray has the base property and shares its memory with the original array, like a view in Numpy. So assigning values to a view changes the original array.

let a = Matft.arange(start: 0, to: 4*4*2, by: 1, shape: [4,4,2])

let b = a[0~<, 1]
b[~<<-1] = MfArray([9999]) // cannot pass Int directly such like 9999

print(a)
/*
mfarray = 
[[[	0,		1],
[	9999,		9999],
[	4,		5],
[	6,		7]],

[[	8,		9],
[	9999,		9999],
[	12,		13],
[	14,		15]],

[[	16,		17],
[	9999,		9999],
[	20,		21],
[	22,		23]],

[[	24,		25],
[	9999,		9999],
[	28,		29],
[	30,		31]]], type=Int, shape=[4, 4, 2]
*/

Copy

To get an independent array, copy it.

Matft	Numpy
`a.shallowcopy()` / `Matft.shallowcopy(a)`	`a.copy()` / `np.copy(a)`
`a.deepcopy()` / `Matft.deepcopy(a)`	`copy.deepcopy(a)`
`a.to_contiguous(mforder: .Row)`	`np.ascontiguousarray(a)`

Copy​

Copy