实现并行计算的方式

有些工具箱内嵌多线程
Parallel Computing Toolbox
MATLAB Parallel Server

Parallel Computing Toolbox

下载工具箱
初始化Matlab并行计算环境：parpool
1
2
parpool(poolsize)
MyPool=parpool(2)
终止并行计算环境
（1）parallel设置中“终止时间” 或（2）命令行
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delete(MyPool)

并行for循环：parfor

parfor将循环迭代分组，每个worker执行一部分

error1：未找到库

poolobj = gcp('nocreate');
addAttachedFiles(MyPool,{'libepanet.dll','epanet2.h'})

error2:变量无法识别

解决 parfor 循环中的变量分类)问题

Classification Description

Loop Serves as a loop index for arrays

Sliced An array whose segments are operated on by different iterations of the loop

Broadcast A variable defined before the loop whose value is used inside the loop, but not assigned inside the loop

Reduction Accumulates a value across iterations of the loop, regardless of iteration order

Temporary A variable created inside the loop, but unlike sliced or reduction variables, not available outside the loop

Note:

Fixed Index Listing. Within the first-level parentheses of a sliced variable’s indexing, the list of indices is the same for all occurrences of a given variable.

Variable B on the left is not sliced because B is indexed by i and i+1 in different places. Variable B on the right is sliced.

| parfor i = 1:10 B(i) = B(i+1) + 1; end | parfor i = 1:10 B(i+1) = B(i+1) + 1; end |

Classification	Description
Loop	Serves as a loop index for arrays
Sliced	An array whose segments are operated on by different iterations of the loop
Broadcast	A variable defined before the loop whose value is used inside the loop, but not assigned inside the loop
Reduction	Accumulates a value across iterations of the loop, regardless of iteration order
Temporary	A variable created inside the loop, but unlike sliced or reduction variables, not available outside the loop

参考资料：

https://blog.csdn.net/enjoyyl/article/details/41929033