Clear Filters
Clear Filters

How to automatically choose to compute for or parfor loops

5 views (last 30 days)
I wonder if there's a way to specify if I want to compute with a normal for or with a parfor.
What I don't want is to make a switch with two cases (case 1 --> parfor; case2 --> for;) because what's inside the loop is quite long so I don't want to copy/paste so many code lines and it's not 100% necessary to make this choice automatic. But sometimes I have to calculate few inputs and sometimes a lot of them.
EDIT: I guess I can make two functions: 1 for looped and another parfor looped, but is there any other option?

Accepted Answer

Sean de Wolski
Sean de Wolski on 21 Aug 2015
You can use this syntax for parfor
parfor (loopvar = initval:endval, M); statements; end
Where M is dynamically determined. If it's zero, then this loop will run serially.
Sean de Wolski
Sean de Wolski on 21 Aug 2015
Edited: Sean de Wolski on 21 Aug 2015
Also, you can turn off the auto start of the pool in preferences so it never starts without you explicitly telling it to.
And, if startup is the cost you don't want to wait for, consider boosting the idle timeout to longer and just keep the pool open.

Sign in to comment.

More Answers (0)


Find more on Loops and Conditional Statements in Help Center and File Exchange


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!