Use parfor and getting "Index exceeds matrix dimensions" error

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NOOR AL-SHAKARJI
NOOR AL-SHAKARJI 2017-2-25
评论： NOOR AL-SHAKARJI 2017-2-26
Pleas need help , I use Parfor to run the code in parallel but I got "Index exceeds matrix diamensions"
when I run the code with for it runs normally.
Rootpath=('............');
flist1=dir(fullfile(Rootpath));
parfor i=3: size (flist1,1)
inputpath=strcat(Rootpath,'/',flist1(i).name,'/');
outpath=strcat('./Output/',flist1(i).name,'/');
if ~isdir(outpath)
mkdir(outpath);
end
Read_main(inputpath,outpath)
end

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Walter Roberson
Walter Roberson 2017-2-26
You could end up with mysterious path problems in the case that your Rootpath was a global variable. Global variables are not copied to parfor workers.
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Walter Roberson
Walter Roberson 2017-2-26
If it is a global variable, copy it to a local variable and use that in the code.
Alternately, you can use parfevalOnAll() before running the parfor, running a small bit of code that creates Rootpath as a global variable and initializing it with the appropriate value.
Or since you do not appear to write to the variable in the code, you could use parallel.pool.constant()
But really, for a simple variable such as this, best would just be to avoid using a global variable.
NOOR AL-SHAKARJI
NOOR AL-SHAKARJI 2017-2-26
Thank You Alot!!!
Now it works
I just put the globla variable inside the body of parfor

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