Declrarion of an array using tilde (~). what is the correct way of using it, because my code prompts me incorrect use of tilde.

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Abraham Bett
Abraham Bett 2022-6-16
编辑： John D'Errico 2022-6-16
this part of my code that genrate the error
[~, i] == max(y);
if i == D(k)
acc = acc + 1;
end

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采纳的回答

GandaBerunda
GandaBerunda 2022-6-16
Hi Abraham,
Instead of an assignment, you are performing a comparison in the line [~,i]==max(y). For assignment, a single = symbol suffices.
Hope it clears your issue.

更多回答（1 个）

John D'Errico
John D'Errico 2022-6-16
编辑：John D'Errico 2022-6-16
This is a test:
if i == D(k)
It is the correct way to use == because == is a comparison operator.
However, this other line is an assignment. That is, you are calling the function max, and returning a result in the variable i.
[~, i] == max(y);
The error mesage about ~ that you report is confusing to you. The problem is, MATLAB was also confused, because you used invalid syntax there. So MATLAB generated whatever error it could. The correct syntax to perform an assignment uses a SINGLE = operator, thus:
[~, i] = max(y);

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