How to use selector block to extract a single element from a 1x2 matrix?

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RevengeOfTee 2020-2-12

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https://ww2.mathworks.cn/matlabcentral/answers/505006-how-to-use-selector-block-to-extract-a-single-element-from-a-1x2-matrix

回答： Siriniharika Katukam 2020-2-17

Hello. I have the matrix [1;1]. How do I use the selector block to extract the first element only? I tried going to the page for the block but it went over my head. Sorry if this is a basic question.

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Bhaskar R 2020-2-12

在 MATLAB Online 中打开

Do you mean

mat = [1;1]; 
extract_single_element = mat(1);     % first element of the matrix mat?

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Answer 1

Siriniharika Katukam 2020-2-17

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Hi,

A selector block is one which selects the input based on the parameter set in the block. To get the first element of the input you are passing, you need to select the parameter “Index Option” as Index Vector(dialog) and then specify which index of input has to be selected and set even the other parameters of selector block appropriately.