What is the Julia equivalent of np.fromfunction?

rhezab · April 20, 2020, 4:21pm

I would like to fill an array with values as a function of its indices.

L_Adam · April 20, 2020, 4:29pm

maybe this?

map(f, Iterators.product(1:nrow, 1:ncol))
# or a simple for loop
[f(i, j) for i in 1:nrow, j in 1:ncol]

rhezab · April 20, 2020, 4:37pm

Thanks! map is what I’m looking for.

I assume using map is better? Do you know if they are the same under the hood?

L_Adam · April 20, 2020, 4:39pm

for comprehension is always faster

rhezab · April 20, 2020, 4:44pm

I just tried it out, you’re right! That’s interesting…

Thank you!