🔒 simple 2d array help

[somber bridge]

what is a quick way to switch all values in a colum to something else:

if I have the 2d array:
[[1,2,3],[4,5,6],[7,8,9]]

I want to switch all of the 2nd colum to it's value +1
[[1,3,3],[4,6,6],[7,9,9]]

[winged tapir]

@somber bridge

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[split ember]

As in a list[list[int]] or a numpy array?

For a list of lists of ints, a for loop works fine: ```py

x = [[1,2,3],[4,5,6],[7,8,9]]
for row in x:
... row[1] += 1
...
print(x)
[[1, 3, 3], [4, 6, 6], [7, 9, 9]]

For numpy, [dimensional indexing](https://numpy.org/doc/2.1/user/basics.indexing.html#dimensional-indexing-tools) plus [broadcasting](https://numpy.org/doc/2.1/user/basics.broadcasting.html#broadcasting) ```py
>>> x = np.arange(1, 10).reshape((3,3))
>>> print(x)
[[1 2 3]
 [4 5 6]
 [7 8 9]]
>>> x[:, 1] += 1
>>> print(x)
[[1 3 3]
 [4 6 6]
 [7 9 9]]

[winged tapir]

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