Sub indexing into cells

Hello,

I am wondering if anyone can give me any pointers on a topic.

I have a logical vector of true false the same number of rows as my raw matrix.

The raw matrix, I would like to index for the rows that that are true in my logical vector.

The raw matrix is in cell format though and is a big mash of numerical and written data so I can't seem to convert it to another form.

Is there a way for me to pull the rows i'm interested in from this matrix?

Thanks for any help/advice/direction

Answer 1

[Thorsten]

 Xnew = X(ind, :);

[Chameleon17]

Thank you very much,

I had tried that already but I get an error message: Subscript indices must either be real positive integers or logicals.

Which I do not understand as the vector I'm using as ind is 1's and 0's?

I think I'm missing something very simple.

[Thorsten]

If it is not logical you have to convert it to logical using

 Xnew = X(logical(ind), :);

As help logical reveals,

    Because logical arrays are returned by the logical operators (&,|,~)
    and the relational operators (==,~=,<,<=,>=,>), as well as by
    functions like ANY, ALL, ISNAN, ISINF, ISFINITE, ISEMPTY, ISEQUAL,
    etc., it is unusual to need to invoke the logical function itself.

So presumably you have obtained your index by some other operations or did some numerical operation on it, (like minus), which caused Matlab to convert to double.

[Chameleon17]

Ah! Yes, thank you, sigh, I should have noticed that.

 Thank you! :)