Find and remove a value from an array

Question

Zenia Askar 2020-1-12

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评论： Zenia Askar 2020-1-14

Hello! I'm trying to find in an array 'done' the position of a value 'next' without the use of a loop. Then, in this array i want to remove from that position found, the existing element.

out=find(done==next);

done(out)=[];

I tried it this way but is doesnt seem to work. Would you find an arror or recommend another way?

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Answer 1

Robert U 2020-1-13

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编辑：Robert U 2020-1-13

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Hi Zenia Askar,

Assuming the content of your variables 'done' and 'next' are numeric your code cannot remove a single value from the matrix without destroying the matrix structure. You should apply logical indexing rather than using 'find()'.

done(done == next) = [];

The result does not represent the matrix structure anymore but is a vector then. To omit that you can place a NaN-value instead.

done(done == next) = NaN;

Kind regards,

Robert