logical indexing in one line when choosing from a column

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

Answer 1

[Stephen23]

matrix(idx,1)

Answer 2

[Erik S.]

you can use the find function instead