How to Simplify Passing Multiple Arguments from Structs in MATLAB Function Calls?

10 次查看（过去 30 天）
Ludwig
Ludwig 2025-2-10
编辑： Matt J 2025-2-11
am working on a MATLAB project where I need to pass multiple arguments from two structs (n and d) to a function called mi_decode. Currently, I am passing each field individually, which makes the code quite verbose and hard to maintain. Here is a snippet of my current code:
function results = spectral_mi(labels, data, n, d)
d.pl_ u int8
d.prr_k cell
d.is_cnrm logical = true
d.is_chk logical = true
d.is_fbk logical = true
d.is_x logical = false
d.is_pl logical = false
d.is_prr logical = false
n.cl uint16 = numel(unique(labels))
n.t uint8 = size(data{1}, 2)
n.k uint8 = numel(data)
n.trials uint8 = numel(labels)
n.f uint8 = fix(size(data{1}, 2)/2)+1
n.pl uint16
% ... other code ...
pow_per_f = cell(1, n.f);
phase_per_f = cell(1, n.f);
for f = 1:n.f
pow_per_f{f} = squeeze(power(abs(st_data(:, f, :)), 2));
phase_per_f{f} = squeeze(angle(st_data(:, f, :)));
end
[mi_, zmi_, pmi_] = mi_decode( ...
labels, pow_per_f{:}, ...
"is_x", d.is_x, ...
"t", n.t, ...
"k", n.f, ...
"pl", n.pl, ...
"is_cnrm", d.is_cnrm, ...
"is_chk", d.is_chk, ...
"is_fbk", d.is_fbk, ...
"is_pl", d.is_pl, ...
"is_prr", d.is_prr);
[phase_mi_, phase_zmi_, phase_pmi_] = mi_decode( ...
labels, phase_per_f{:}, ...
"is_x", d.is_x, ...
"t", n.t, ...
"k", n.f, ...
"pl", n.pl, ...
"is_cnrm", d.is_cnrm, ...
"is_chk", d.is_chk, ...
"is_fbk", d.is_fbk, ...
"is_pl", d.is_pl, ...
"is_prr", d.is_prr);
end
Is there a more concise way to pass all the fields from the structs n and d to the mi_decode function without listing each field individually? Any suggestions or best practices for handling this in MATLAB would be greatly appreciated.
  3 个评论
显示 1更早的评论
Ludwig
Ludwig 2025-2-10
编辑：Ludwig 2025-2-10
How would this be done in practice? @Stephen23
If I'd try to pass the whole struct:
[mi_, zmi_, pmi_] = mi_decode( ...
l_, pow_per_f{:}, "d", d, "n", n);
I get:
"Invalid argument at position 117. Value must be of type double or be convertible to double."
The whole argument list is:
arguments
l_ (:, 1) uint8
end
arguments (Repeating)
rr_k double
end
arguments
d.pl_ uint8
d.prr_k cell
d.is_cnrm logical = true
d.is_chk logical = true
d.is_fbk logical = true
d.is_x logical = false
d.is_pl logical = false
d.is_prr logical = false
n.cl uint16 = numel(unique(l_))
n.t uint8 = size(rr_k{1}, 2)
n.k uint8 = numel(rr_k)
n.trials uint8 = numel(l_)
n.f uint8 = fix(size(rr_k{1}, 2)/2)+1
n.pl uint16
end
Stephen23
Stephen23 2025-2-10
编辑：Stephen23 2025-2-10
"How would this be done in practice?"
You would have to rewrite the function to accept those scalar structures as inputs.
Note that INPUTPARSER can do this:
https://www.mathworks.com/help/matlab/ref/inputparser.html
or you could write the function itself to accept those structures and refer to their fields, exactly like spectral_mi is.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Matt J
Matt J 2025-2-10
编辑：Matt J 2025-2-11
You can use namedargs2cell and comma-separated list expansion to pass multiple name-value pairs,e.g.,
function main(struct_n,struct_d)
cell_n=namedargs2cell(struct_n);
cell_d=namedargs2cell(struct_d);
someFunction(cell_n{:},cell_d{:});
end
function someFunction(n,d)
arguments
n.cl uint16
n.t uint8
n.k uint8
n.trials uint8
n.f uint8
n.pl uint16
d.pl_u int8
d.prr_k cell
d.is_cnrm logical = true
d.is_chk logical = true
d.is_fbk logical = true
d.is_x logical = false
d.is_pl logical = false
d.is_prr logical = false
end
...
end

类别

在 Help Center 和 File Exchange 中查找有关 Atomic, Molecular & Optical 的更多信息

标签

产品


版本

R2024b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by