How to limit variables in input function?

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Triveni
Triveni 2022-5-23
评论： Triveni 2022-6-4
I have a function
[P_max1(j), ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~] = tcfun1(1,P_min11 (j), P_max11(j), T, 1);
It perfectly runs.
When I use
[P_max1(j), ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~] = tcfun2(1,P_min11 (j), T, 1);
It perfectly runs.
but when i use
[P_max1(j), ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~] = tcfun3(1,P_min11 (j), ~, T, 1);
It gets error.
please help me.

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采纳的回答

Matt J
Matt J 2022-5-23
It does not make sense to have a tilde as an input argument in a function call. Perhaps you meant,
tcfun3(1,P_min11 (j), T, 1);
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Walter Roberson
Walter Roberson 2022-5-24
MATLAB has no way to indicate "missing parameter", with the exception that if a parameter and all following parameters are to be missing then you can leave them all out and the code can use nargin() to tell.
In any case where a missing parameter is followed by a non-missing parameter, the best you can do is create a new class such as MISSING and pass an object of that class, and then have the code use isa() to detect that a parameter was passed but the parameter was that kind of object. This would require that the code be specifically written for your class. Unlike Python, MATLAB does not offer any MISSING indicator built-in
Triveni
Triveni 2022-6-4
Yes, when i sent [] as empty matrix. and add statement within the function
if isempty(idx)
clear idx
end
perfectly work as i want.

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