Please help me vectorizing the following code
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n=2:nt;
sum1(n)=f(t(n),alpha)+(var).*bj(n).*u(1);
k=1:n-1;var_bj=(bj(k+1)-bj(k)).*(var);
for n=2:nt
sum2=0;
for k=1:n-1
sum2=sum2+var_bj.*u(n-k);
end
sumout2(n)=sum2;
u(n)=(sum1(n)-sumout2(n))/(var-beta);
end
1 个评论
Alexandra Harkai
2017-3-14
Tell us more about the variables you have, for example, what are their sizes? What is your code trying to do?
采纳的回答
Jan
2017-3-14
For a vectorization, move the index vector from the for loop into the command. For the innermost loop:
sum2 = 0;
for k = 1:n-1
sum2 = sum2 + var_bj .* u(n-k);
end
becomes (I guess that var_bj is a scalar):
sum2 = sum(u(n - (1:n-1))) * var_bj;
This can be simplified:
sum2 = sum(u(1:n)) * var_bj;
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