cell multiplication with a vector

Question

David Kusnirak 2013-6-13

Hi,

I have a cell structure (Aa), where each cell is a square sparse matrix and I need to multiply each cell with a vector (fi) to produce a matrix Aaf.

my code to do this is:

    Aaf=zeros(numel(sig),length(Aa));
    for j=1:length(Aa);
        Aaf(:,j)=Aa{j}*fi;
    end

but it seems to be pretty ineffective, so I' ve tried to evaluate it using a cellfun, but it doesn't work

Aaf_test = cellfun(@(x) x * fi(:,1),Aa);

Does anybody know ho do the multiplication faster than the for loop?

thanks

Answer 1

Azzi Abdelmalek 2013-6-13

Aaf_test = cellfun(@(x) x * fi,Aa,'un',0);

David Kusnirak 2013-6-13

it works well thanks, but yields even worse performance, than the for loop..shame