Streamlining Code for Efficiency

Hi all,

Was wondering if there's any way to make this code run faster. This is just a snapshot of the code:

• I have an array y of size (e.g. 63 rows, 6 columns) made up of just 1s and 0s.
• I'm applying some logical constraints (> 20) to it (termed as "LogicT")
• I've put the logic test within the "for" loop, but am wondering how I can place it outside the "for" loop for faster run time (e.g. specifying "i" as a variable?)?

 for i = 1:size(y,1)

    LogicT{1} = (y(i,1)+ y(i,2)) <=1;
    LogicT{2} = y(i,2) == y(i,6);
    LogicT{3} = 1 - y(i,3) + y(i,1) + y(i,2)>= 1;

    if LogicT{1} == 1 && ...
       LogicT{2} == 1 && ...
       LogicT{3} == 1

       TotalNew(i,:) = y(i,:);
    else TotalNew(i,:) = zeros(1,size(y,2));
    end
end

Many thanks in advance for your help. And apologies if this is a trivial question.

Best regards, Eugene

Answer 1

[Roger Stafford]

 TotalNew = bsxfun(@times,(y(:,1)+y(:,2)<=1)&(y(:,2)==y(:,6))&(1-y(:,3)+y(:,1)+y(:,2)>=1),y);

[eugene479]

Perfect! Works like a charm. Thank you so much!