call function with multiparameter:what is the best solution?

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Luca Re
Luca Re 2023-11-13
评论： Luca Re 2023-11-14
%WHAT IS best solution ?
%Solution A:
a)CaricoSistemi2Last_Struct(Settings,[])
b)CaricoSistemi2Last_Struct(Settings,mat)
function D_=CaricoSistemi2Last_Struct(Settings,mat)
if isempty(mat)
D1=load(Settings.tslist,'-mat');
D_=D1.StratList;
else
D_=mat;
end
....
....
end
%Solution B:
a)CaricoSistemi2Last_Struct(Settings)
b)CaricoSistemi2Last_Struct(Settings,mat)
function D_=CaricoSistemi2Last_Struct(Settings,mat)
if nargin<2
D1=load(Settings.tslist,'-mat');
D_=D1.StratList;
else
D_=mat;
end
....
....
end
  1 个评论
Les Beckham
Les Beckham 2023-11-13
I would say that this is mostly a matter of personal preference.
Solution B is probably more commonly used. Solution A is often used if you have additional arguments after your "optional" second argument.

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采纳的回答

Chunru
Chunru 2023-11-14
You could also use arguments block. doc arguments for more details.
a)CaricoSistemi2Last_Struct(Settings)
b)CaricoSistemi2Last_Struct(Settings,mat)
function D_=CaricoSistemi2Last_Struct(Settings,mat)
arguments
Settings
mat = []; % default
end
if isempty(mat)
D1=load(Settings.tslist,'-mat');
D_=D1.StratList;
end
% More codes
  3 个评论
显示 1更早的评论
Chunru
Chunru 2023-11-14
编辑：Chunru 2023-11-14
Matlab function arguments are positional, meaning that the positions are important.
For example, you can not call using second parameter CaricoSistemi2Last_Struct(mat) in the following code
function D_=CaricoSistemi2Last_Struct(Settings,mat)
arguments
Settings
mat = []; % default
end
If you do want to use the name-value-pair way of passing argument, you can do the following
function D_=CaricoSistemi2Last_Struct(options)
arguments
options.Settings = [] % your default
options.mat = []; % default
end
Then you can call the function CaricoSistemi2Last_Struct(mat=matval)
Again, doc arguments for more details.

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