Community Profile

photo

Raymond Norris

MathWorks

Last seen: Today Active since 2003

Statistics

All
  • Revival Level 2
  • 12 Month Streak
  • Knowledgeable Level 3
  • Personal Best Downloads Level 2
  • First Review
  • 5-Star Galaxy Level 3
  • First Submission
  • First Answer
  • Solver

View badges

Content Feed

View by

Answered
parfor slower than for
There are several considerations How many dedicated workers? Most often, more workers, the lower the amount of time. Amount of...

alrededor de 5 horas ago | 0

Answered
unrecognized function or variable in parfor
I don't have much time to look at this closer, so I'll give a couple of quick thoughts For starters, I would suggest going thro...

3 días ago | 1

Answered
Parallel pool error, automatically clear jobstoragelocation
Look at my answer here for an option: https://www.mathworks.com/matlabcentral/answers/1440039-how-to-prevent-parpool-error#answe...

3 días ago | 0

Answered
How to use All cores
To increase the number of permissible local workers, you could run local = parcluster('local'); local.NumWorkers = 44; pool =...

5 días ago | 0

Answered
How can i run multiple callback functions based on a single event?
If you have the Parallel Computing Toolbox, then this might not be exactly what you're looking for, but it might get you started...

20 días ago | 0

Answered
MATLAB crashes with only two lines in crash dump stack trace
This post isn't getting stack traces, but it might point you in the right direction: https://www.mathworks.com/matlabcentral/ans...

20 días ago | 0

Answered
Parallelization in MATLAB R2018b
Please include how you're starting the parpool and how mex is being called. I suspect the issue is that the files required when...

21 días ago | 0

| accepted

Answered
How to run a MATLAB file in for loop in batch file step by step
Try using the -wait switch. E.g. @echo off for /l %%x in (1, 1, 2) do ( call matlab -wait -nosplash -r "cd('H:\EngFiles\A...

25 días ago | 0

| accepted

Answered
How to prevent parpool Error
There's a slight change it's because multiple jobs are running at the same time, all contending for the same subfolder. If so, ...

27 días ago | 1

| accepted

Answered
Is there a way to start a parellel pool with maximum available workers as the cores on the machine?
pool = parpool('local',maxNumCompThreads); Alternatively, if you're running this through a scheduler (e.g. PBS), you could quer...

27 días ago | 0

Answered
Batch jobs of similar data size and function files are taking different times for job completion, though all are started at same time.
Not sure why the 1st task isn't finishing, but here's another approach. Keep what you have, but rather than using batch, use pa...

alrededor de 1 mes ago | 1

| accepted

Solved


Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

alrededor de 1 mes ago

Answered
Running two loop together at the same time
Try using parfeval, such as the following pseudo code function start_Callback(hObject, eventdata, handles) pool = gcp('nocreat...

alrededor de 1 mes ago | 0

| accepted

Answered
How to opening 1 instance of MATLAB from MATLAB, but accessing it multiple times
Using the Parallel Computing Toolbox, look at parpool and parfeval. parpool will start a N number of "workers" (i.e. headless i...

alrededor de 1 mes ago | 0

| accepted

Answered
Cannot start parallel pool R2020a
Do you have other versions of MATLAB installed? If so, which? Had your run parpool successfully on those version(s)? One sugg...

alrededor de 1 mes ago | 0

Answered
parFor Worker unable to find file. Unrecognized function or variable 'parameters'
As Edric mentioned, this is/may not parallizable. But if it were, you'd need to make modifications to the for-loop. You've inc...

alrededor de 1 mes ago | 0

Answered
Parfor general question and thought
A parfor is run synchoneously. That is, the parfor is blocking until complete. By that logic, two parfor loops can only run se...

alrededor de 2 meses ago | 0

Answered
Error using Parfor "Unable to classify the variable 'Sort'"
Try this refactoring the for-loop a bit parfor k=1:Np flag = 0; %#ok<PFTUSW> for i=1:(Nu-1) for j=(i+1):Nu ...

alrededor de 2 meses ago | 0

| accepted

Answered
using parfor loop for marking the image/advice on other method for marking image
The issue is that your plotting in the parfor loop, which has no display. Create a DataQueue and pipe the data back to the clie...

alrededor de 2 meses ago | 0

| accepted

Answered
Submitting parallel compiled code to SLURM
Perhaps there's a race condition. Take a look at https://www.mathworks.com/matlabcentral/answers/545174-how-can-i-work-ar...

alrededor de 2 meses ago | 0

Answered
parallel computing toolbox - how to directly talk to the Workers?
You can use different schedulers; however, you need to call the parpool command to start workers. In order to start the workers...

2 meses ago | 0

| accepted

Answered
Converting for loops to parfor format gives error "Error: Unable to classify the variable 'f_est_1' in the body of the parfor-loop."
I'm gathering the for-loop you're trying to re-write is for i = 1:length(x) Assuming you're able to re-write this, have you co...

2 meses ago | 0

Answered
What type of Amazon EC2 server for MathWorks Cloud Center
Just to clarify Walter's 2nd comment, he's suggesting a compute cluster. What you're saying is that your university does not hav...

2 meses ago | 0

Answered
codegen incorrect argument data type in Matlab example
There are several codegen functions/methods MATLAB Coder Control Toolbox Is it possible you have Control Toolbox installed, b...

2 meses ago | 0

Answered
how to use threads in matlab app designer
Do you have Parallel Computing Toolbox? If so, consider looking at parfeval.

3 meses ago | 0

Answered
Parfor number of workers, CPUs, how are they related? What are the limits?
A quadcore computer should max at 4 workers. We don't suggest throttling it to include hyperthreads. With that said, let's say ...

3 meses ago | 2

| accepted

Answered
Parfor Loop & EnergyPlus Co-Simulation
I would suggest trying this first with a pool size of 1. If it works, then my guess is that mlep only allows one connection at ...

3 meses ago | 0

| accepted

Answered
How to set up a Matlab parallel cluster for thread-based environment
The thread-based pool only runs on the same machine as the MATLAB client, similar to a local process-based pool. However, unlik...

3 meses ago | 0

| accepted

Answered
parfor variable classification issue
As a side note, the difference of min and max could be 1000, but there are infinity cases where j1 will start outside the bounda...

4 meses ago | 0

Answered
SPMD Error detected on worker
Since this is about learning parallel programming, I'll avoid the suggestion of how to run this serially, as this example will r...

4 meses ago | 0

| accepted

Load more