How to pre-allocate my loop for speed?. Learn more about for loop, peaks, matlab, matlab coder
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I need to calculate area of Voronoi polygons for around 3000 points. I use VoronoiLimit function to bound it (specific reason) and then use for loop to perform calculations. But it is high time consuming. Can someone help me to speed up the code?
'vals' might be growing inside a loop. Consider preallocating for speed. 根据建议,第一步是要给一些数组预分配空间。这样做是因为matlab使用的内存中连续的块,因此,如果在循环里不断改变数组大小,matlab就要不断寻找合适大小的内存片段并把数据移动过去。如果分配了一个比较大的空间,matlab就可以一直在这个连续空...
I have tried to modify the code a bit and use aparforloop but it seems to actually take more time than the simpleforloop (with 2 workers). What could I do to speed up this part of the code? Should I try to use? I would appreciate any tips ...
1.“计算向量、矩阵化,尽量减少for循环。”[/B] 因为MATLAB本来就是矩阵实验室的意思,他提供了极其强大而灵活的矩阵运算能力,你就没必要自己再用自己编写的for循环去实现矩阵运算的功能了。另外由于matlab是一种解释性语言,所以最忌讳直接使用循环语句。但在有些情况下,使用for循环可以提高程序的易读性,在效率提高不...
首先,看看Improving the Speed of MATLAB Calculations这篇文章中怎么说的。 在前言中,文章中有两段话: MATLAB programs are interpretted. This would seem to make it inapproapriate for large scale scientific computing. The power of MATLAB is realized with its extensive set of libraries which are compil...
including the time required to transfer data from the client to the workers and back. This example shows a good speed-up with relatively small parallel overhead, and benefits from conversion into aparfor-loop. Not allfor-loop iterations can be turned into fasterparfor-loops. To learn more, ...
To enable automatic parallelization offor-loops, in theMATLAB Coder™app, in theGenerate Codestep, selectMore Settings > Speed > Enable automatic parallelization. ParallelizeforLoops at Command Line You can enable parallelization of thefor-loops by using the command-line interface. Consider the func...
title('Open-loop Disturbance Step Response') xlabel('Time (sec)'), ylabel('\omega_o'), grid % % Steady-state error -> last value of output yo % yo(length(T)) 开环系统对阶跃告饶信号的响应 2. 闭环系统对阶跃告饶信号的响应 % Analysis of the closed-loop speed control system. ...