logical indexing in one line when choosing from a column

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Theo
Theo 2015-2-18
回答： Stephen23 2015-2-18
I want to choose a column vector from a matrix and do the logical indexing on it. For example
chosen=matrix(:,1);
chosen=chosen(idx);
where in above idx is a logical index vector. Now my problem is I don't want to do it in two lines, I'm thinking about something like
chosen=matrix(:,1)(idx);
now I know the above expression is wrong, but is there a valid replacement for that? Thanks

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Stephen23
Stephen23 2015-2-18
matrix(idx,1)

更多回答（1 个）

Erik S.
Erik S. 2015-2-18
you can use the find function instead

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