What does ~ stand for in the following example?

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Nicoleta 2016-1-1

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https://ww2.mathworks.cn/matlabcentral/answers/262384-what-does-stand-for-in-the-following-example

评论： Star Strider 2016-1-9

采纳的回答： Star Strider

What does this piece of code mean? [~,~,P] = size(I);

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Star Strider 2016-1-1

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https://ww2.mathworks.cn/matlabcentral/answers/262384-what-does-stand-for-in-the-following-example#answer_204828

The ‘~’ in that context tells the function to not return that particular output. Apparently ‘I’ is a 3D array, and the person who wrote that only wanted to know the number of ‘pages’ (3rd dimension) of it, not the number of rows or columns, the first and second dimensions respectively.