matlab的tic和toc是什么意思

Plqaokwsijed1 2016-09-22 16:52:32 463 浏览

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MATLAB tic toc计算时间问题: 用MATLAB的tic toc函数计算时间时， diyi次运行与多次运行的时间不等这是怎么回事例如运行 for i=1:10 tic summ=sum(1:1000); toc end 结果显示 Elapsed time is 0.000407 seconds. Elapsed time is 0.000021 seconds. Elapsed time ... 用MATLAB的tic toc函数计算时间时， diyi次运行与多次运行的时间不等这是怎么回事例如运行 for i=1:10 tic summ=sum(1:1000); toc end 结果显示 Elapsed time is 0.000407 seconds. Elapsed time is 0.000021 seconds. Elapsed time is 0.000017 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. Elapsed time is 0.000016 seconds. 明显diyi次运行时间比以后几次长很多，第二次也是，到了后来时间趋于平稳展开

matlab问题：tic，toc是什么东西，怎么用的: tic， s=0; for i=1:100000， s=s+1/2^i+1/3^i; end; toc 这样的一个语句，为什么每次的到的结果不同 Elapsed time is 0.189000 seconds. Elapsed time is 0.210000 seconds. Elapsed time is 0.196000 seconds. Elapsed time is 0.203000 seconds. Elaps... tic， s=0; for i=1:100000， s=s+1/2^i+1/3^i; end; toc 这样的一个语句，为什么每次的到的结果不同 Elapsed time is 0.189000 seconds. Elapsed time is 0.210000 seconds. Elapsed time is 0.196000 seconds. Elapsed time is 0.203000 seconds. Elapsed time is 0.197000 seconds. Elapsed time is 0.205000 seconds. Elapsed time is 0.199000 seconds. Elapsed time is 0.199000 seconds. Elapsed time is 0.189000 seconds. 展开