MATLAB中运行时间的函数

 

 

clear;
sqr = zeros(1,1000);
tic;
for ii = 1:1000
    sqr(ii) = ii.^2;
end
tim = toc;
fprintf('version: tic --toc : the for statements use time %15.5f./n',tim);

 

 

 

 

clear;
sqr = zeros(1,1000);
tim = cputime;
for ii = 1:1000;
    sqr(ii) = i.^2;
end
tim = cputime - tim;
fprintf('version:cputime : the for statememts use time %15.5f./n',tim);

 

 

 

 

clear;
sqr = zeros(1,1000);
tim = clock;
for ii = 1:1000
    sqr(ii) = i.^2;
end
tim = etime(clock,tim);
fprintf('version:clock--etime : the for statements use time %15.5f./n',tim);