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error running lines with parallel computing toolbox,
I suspect you're running MATLAB in a -nodisplay mode, and somwhere inside the code you're using, ParforProgMon is not equipped t...

8달 전 | 0

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Is there a built-in function to validate a class property that should be a cell array?
Rather than a validator, you could perhaps just use the class specification? (In my code below I'm using a function with an argu...

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Parallel pool on function that uses persistent variables
As Walter points out, workers (either threads or processes) do not share persistent variable workspaces. I too cannot find this ...

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What can I do/try to make MATLAB release the GPU after a GPU runtime error?
Use this: reset(gpuDevice)

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Difference between debug parfor loop and run it
Further to Walter's answer, parfor assumes that anything that is not statically provable to be a variable reference must be a fu...

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Error: Unable to classify a variable in the body of the parfor-loop
The problem here is that you've got two different accesses to the variable out. On line 7, you have the valid sliced indexing ex...

8달 전 | 2

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proper use of DataQueue and PollableDataQueue inside of App Designer class?
In this case, the problem is not with your DataQueue - it's actually with the function handle you're passing in to parfeval. The...

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How does an active parpool influence serial / threaded mex computation? (runtime/memory)
Simply: an idle parpool should be doing nothing very much other than sitting there consuming some memory. It should consume only...

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Separating subtables from a larger table by using the variable values in a column
Rather than looping, you might be able to use findgroups and splitapply to do what you need. Imagine you wish to compute the max...

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Shared memory in parfor genetic algorithm
If you're using R2022a or later, you could use ValueStore to allow workers to share values. The main requirement here is for you...

9달 전 | 1

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How to input global variables in function that is in parloop?
Another option is to use parallel.pool.Constant to arrange for the data to be loaded and then accessed. This can be a bit simple...

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How to change the parameter in Mask and run the simulation parallel
Given a simple model like this which has a mask with a parameter named gain_val You need to do something like this: mdl = 'm...

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Setting up parallel computations for a single dataset, as opposed to spmd
This is precisely the sort of thing that parallel.pool.Constant was designed for. You build a Constant once on the client, the d...

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How to work with nested containers.Map()s inside a parfor loop
containers.Map instances are MATLAB handle objects. These get copied to the workers, and so when you try to modify them on the w...

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unable to classify the variable 'F' in the body of the parfor-loop
This use of F creates an order depdency between loop iterations. (You're modifying F on each loop iteration). I'm not entirely s...

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How to repeat/continue iteration of a parfor loop without incrementing the loop counter untill condition is satisfied
It's not entirely clear how your "do something" chooses what to do. I think we need to see a little more detail there. Setting t...

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Parallel Toolbox to write many Excel files: How to assign specific job to Workers?
The function xlswrite is no longer recommended, and you should use writematrix instead. The problem you're seeing is because sev...

10달 전 | 2

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How to create data file and copying data on it for parallel programing in MATLAB?
You are quite right that trying to write to the same file from multiple workers will cause problems. Here's one way that you cou...

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How do you remove rows from tall arrays?
As the error message states, the only way to remove specific rows from a tall array is with a logical vector. In other words, th...

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"parameter {0} must be a real scalar" error when using parfor
I think you need to use createConnectionForPool to make your database connection object and have it work correctly inside your p...

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How to let a lab tell if another lab is idle or not in a spmd block at that time : isidle(labindex)
I can think of a few ways around this: As you suggest, labProbe can tell you if there's an incoming message ready to be receive...

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When I use parfor in the program, the program seems to fall into an endless loop in the remoteparfor.m file, resulting in the program's delay in output.What's going on?
The file "remoteparfor.m" is part of the implementation of a parfor loop. The main job of this piece of code is to wait for resu...

11달 전 | 0

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reproducible and independent random stream generation in parfor loop
This topic is covered here in the documentation. You should not mix setting 'Seed' with setting 'Substream'. (The 'Seed' value s...

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Running parfor loop in R2013a
Yes, Parallel Computing Toolbox was available for R2013a. Yes, in R2013a, you need to explicitly create the parallel pool using ...

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parfor for movie writeVideo
The problem is that you're trying to send a VideoWriter object to the workers, and that's not allowed. A secondary problem is th...

11달 전 | 0

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Dramatic but intermittent slow down of parallel system calls
This sort of sporadic slowness can be extremely hard to track down. I'm not an expert on how MATLAB manages system calls, but I'...

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Access composite variables after parallelpool shutdown
Unfortunately there is not. The contents of Composite (and distributed arrays) are always left on the workers until you explicit...

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Multiple Parallel Jobs on Server
You say that "main.m" script uses 4 cores to do parallel computing. I presume this means that it contains a parfor loop. One way...

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parfor treats variable as function
This is a limitation of parfor. The documentation here describes the principle reason, but doesn't quite show an example exactly...

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How can I make more efficient use of parallel workers?
A couple of suggestions: you could consider using DataQueue rather than writing files to track progress on the workers. Yes, it ...

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