Alternative code that runs much faster?
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Hi,
We built this code:
A = zeros(n,y);
A (:,1) = -3;
x1 = zeros(n,y);
x2 = zeros(n,y);
x3 = zeros(n,y);
B = zeros(n,y);
B (:,1) = 0.3;
Z = zeros(n,y);
Z (:,1) = 0;
for k=1:n
for j=2:y
max_index=j-1;
Powers_function=(0:max_index);
A (k,j) = C(k,j-1)*B(k,j-1) + D(k,j-1) - E (k,j-1);
f = @(x) sum(A(k,1:j)./(1+x).^Powers_function(1,1:j));
Z(k,j) = fzero(f,0,optimset('display','off'));
Z(isnan(Z)) = 0;
Z((Z<0)) = 0;
if Z (k,j)<0.05
x1(k,j-1) = 0.60;
else
x1(k,j-1) = 0;
end
if (Z(k,j) >= 0.05) && (Z(k,j) <= 0.20)
x2(k,j-1) = 0.60 - (Z(k,j)/0.35);
else
x2(k,j-1) = 0;
end
if Z(k,j) > 0.20
x3(k,j-1) = 0.45;
else
x3(k,j-1) = 0;
end
B(k,j) = max(x1(k,j-1),max(x2(k,j-1),x3(k,j-1)));
end
end
This is running for a long long time for n=10000 and y=28.
Isn't there an alternative code to compute the same in much less time?
Thanks,
3 Comments
Steven Lord
on 21 Oct 2016
Can you describe in words (NOT equations or code) what problem you're trying to solve using this code? Perhaps knowing the problem will help people suggest a more efficient solution.
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