How can I measure time on MATLAB?
1 次查看(过去 30 天)
显示 更早的评论
Hi, I am trying to measure the running time of solving system of linear equations using tic , toc. I have to compute the system of linear equation with (A+aI) for different scaler a in one code. How to measure the time of computing the system of linear equations for all a. Do we need to compute the total as I did below or we need to take the average of time?
n=200;
A=full(gallery('tridiag',n,1,2,1));
b=randn(n,1);
tic
[L,U]=lu(A+3*eye(n));
t=L\b;
x=U\t;
time(1)=toc;
tic
[L1,U1]=lu(A+6*eye(n));
t1=L1\b;
x1=U1\t1;
time(2)=toc;
total=time(1)+time(2);
0 个评论
回答(1 个)
David Hill
2020-7-24
n=200;
A=full(gallery('tridiag',n,1,2,1));
a=[3,6];
b=randn(n,1);
for k=1:length(a)
tic
[L,U]=lu(A+a(k)*eye(n));
t(k)=L\b;
x(k)=U\t(k);
time(k)=toc;
end
totalTime=sum(time);
5 个评论
Walter Roberson
2020-7-25
What is "best" depends upon your needs, but mean() or median() is most often the useful measure.
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!