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Ingy döt Net 2023-07-01 11:58:00 -04:00
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41
Task/Multi-dimensional-array/Python/multi-dimensional-array-1.py Normal file
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>>> from pprint import pprint as pp # Pretty printer
>>> from itertools import product
>>>
>>> def dict_as_mdarray(dimensions=(2, 3), init=0.0):
... return {indices: init for indices in product(*(range(i) for i in dimensions))}
...
>>>
>>> mdarray = dict_as_mdarray((2, 3, 4, 5))
>>> pp(mdarray)
{(0, 0, 0, 0): 0.0,
(0, 0, 0, 1): 0.0,
(0, 0, 0, 2): 0.0,
(0, 0, 0, 3): 0.0,
(0, 0, 0, 4): 0.0,
(0, 0, 1, 0): 0.0,
...
(1, 2, 3, 0): 0.0,
(1, 2, 3, 1): 0.0,
(1, 2, 3, 2): 0.0,
(1, 2, 3, 3): 0.0,
(1, 2, 3, 4): 0.0}
>>> mdarray[(0, 1, 2, 3)]
0.0
>>> mdarray[(0, 1, 2, 3)] = 6.78
>>> mdarray[(0, 1, 2, 3)]
6.78
>>> mdarray[(0, 1, 2, 3)] = 5.4321
>>> mdarray[(0, 1, 2, 3)]
5.4321
>>> pp(mdarray)
{(0, 0, 0, 0): 0.0,
(0, 0, 0, 1): 0.0,
(0, 0, 0, 2): 0.0,
...
(0, 1, 2, 2): 0.0,
(0, 1, 2, 3): 5.4321,
(0, 1, 2, 4): 0.0,
...
(1, 2, 3, 3): 0.0,
(1, 2, 3, 4): 0.0}
>>>

6
Task/Multi-dimensional-array/Python/multi-dimensional-array-2.py Normal file
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import numpy as np
a = np.array([[1, 2], [3, 4]], order="C")
b = np.array([[1, 2], [3, 4]], order="F")
np.reshape(a, (4,)) # [1, 2, 3, 4]
np.reshape(b, (4,)) # [1, 2, 3, 4]
np.reshape(b, (4,), order="A") # [1, 3, 2, 4]

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Task/Multi-dimensional-array/Python/multi-dimensional-array-3.py Normal file
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>>> from numpy import *
>>>
>>> mdarray = zeros((2, 3, 4, 5), dtype=int8, order='F')
>>> mdarray
array([[[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]],
[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]],
[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]]],
[[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]],
[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]],
[[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0],
[0, 0, 0, 0, 0]]]], dtype=int8)
>>> mdarray[0, 1, 2, 3]
0
>>> mdarray[0, 1, 2, 3] = 123
>>> mdarray[0, 1, 2, 3]
123
>>> mdarray[0, 1, 2, 3] = 666
>>> mdarray[0, 1, 2, 3]
-102
>>> mdarray[0, 1, 2, 3] = 255
>>> mdarray[0, 1, 2, 3]
-1
>>> mdarray[0, 1, 2, 3] = -128
>>> mdarray[0, 1, 2, 3]
-128
>>> mdarray
array([[[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0]],
[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, -128, 0],
[ 0, 0, 0, 0, 0]],
[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0]]],
[[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0]],
[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0]],
[[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0]]]], dtype=int8)
>>>