I would like to define a certain function that takes a vector as input and does some computations that involving varying just one of the entries. For example, if the input vector is a, I would like to compute f(a) whlie “pretending” that a[1] = 0. One way to do this is b = copy(a); b[1] = 0, f(b), …

[image] maxkapur: let a = a, a[1] = m # do some computations on a @show a end Even if this were valid syntax, it wouldn’t do what you want anyway because let a=a doesn’t change the fact that a points to the same value, so mutating that array will still mutate t…

Is `let` the right tool for this task?

New to Julia

jzr April 22, 2021, 5:55am 7

Masked arrays are discussed in Mask on a 1D array - #2 by rdeits

2 Likes

Topic		Replies	Views
Vectors vs. Tuples and multiple dispatch New to Julia performance	3	938	April 14, 2021
Avoid writing exponentially many methods for a function that may take vectors or matrices New to Julia broadcasting , multiple-dispatch	3	179	February 14, 2025
Choose different behavior depending on possible arguments of user-defined function General Usage	6	281	March 23, 2022
Lapply with different outputs in Julia New to Julia	5	255	January 17, 2023
What's the "right" way to broadcast vector-valued functions? New to Julia broadcast , array	4	1579	November 6, 2019

Is `let` the right tool for this task?

Related topics