Using ndgrid / meshgrid functions in Julia
I am trying to find functionality in Julia similar to MATLAB meshgrid
or ndgrid
. I know what Julia defined ndgrid
in the examples , but when I try to use her I get the following error.
UndefVarError: ndgrid is not defined
Does anyone know how to get the inline function ndgrid
to work, or perhaps another function I haven't found, or a library that provides these methods (inline function preferred)? I would rather not write in this case.
Thank!
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We prefer to avoid these functions as they allocate arrays that are not normally needed. The values in these arrays are structured so regularly that they do not need to be stored; they can be simply computed during iteration. For example, one alternative approach is to write an array comprehension:
julia> [ 10i + j for i=1:5, j=1:5 ]
5×5 Array{Int64,2}:
11 12 13 14 15
21 22 23 24 25
31 32 33 34 35
41 42 43 44 45
51 52 53 54 55
Or you can write loops for
or iterate over an iterator product
:
julia> collect(Iterators.product(1:2, 3:4))
2×2 Array{Tuple{Int64,Int64},2}:
(1, 3) (1, 4)
(2, 3) (2, 4)
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