Parallel processing 有没有办法在matlab中为spmd命令添加一个开关？

我正在使用matlab2011进行多核并行计算，在我的代码中，它只是用block SPMD END实现的。但是，有时我想根据输入参数关闭程序中的spmd。我尝试了以下代码，但不起作用

if (switchSpmdOn)
  spmd
end
% here I put my code for calculation in parallel or series
if (switchSpmdOn)
  end % this end is used to close the spmd block
end

---

我想知道代码中是否有类似于marco的东西可以关闭spmd。

您可以将工作人员的数量作为参数传递给

spmd

。如果指定的工人数量为

0

，即

然后MATLAB将在本地执行块体并创建复合对象，就像没有可用的池一样

示例

switchSpmdOn = true;

%# set the number of workers
if (switchSpmdOn)
    workers = 3; 
    matlabpool(workers);
else
    workers = 0;
end

%# application. if 'workers' is 0, MATLAB will execute this code locally
spmd (workers)
    %# build magic squares in parallel
    q = magic(labindex + 2);
end

for ii=1:length(q)
  % plot each magic square
  figure, imagesc(q{ii});
end

if (switchSpmdOn)
    matlabpool close
end

switchSpmdOn = true;

%# set the number of workers
if (switchSpmdOn)
    workers = 3; 
    matlabpool(workers);
else
    workers = 0;
end

%# application. if 'workers' is 0, MATLAB will execute this code locally
spmd (workers)
    %# build magic squares in parallel
    q = magic(labindex + 2);
end

for ii=1:length(q)
  % plot each magic square
  figure, imagesc(q{ii});
end

if (switchSpmdOn)
    matlabpool close
end