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Christopher McCausland


Last seen: 4 months ago |  Active since 2019

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Best practice: CWT image generating for Deep Learning images
Hi, I am looking some advice/best practice for genrating, formating and saving CWT images. The task: I have ~5000 hours of EE...

4 months ago | 1 answer | 0

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answer

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Could anyone help me with an error in my code?
Hi Thobias, "Not enough input arguments" typically is thrown when the function is called without the required input variables;...

10 months ago | 0

Answered
I am trying to get my answer to Display but it wont let me
Hi Bastian, Try replacing disp('the roots will be',(x)) with fprintf('the roots will be %d. \n',x) This should correct ...

12 months ago | 0

Question


Parfor with options = statset('UseParallel',true);
Hi I have access to a large cluster many CPU's. I am hoping to prefrom the same operations on several hundred .edf input files...

1 year ago | 2 answers | 0

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How can I resolve the subscripted assignment dimension mismatch error (for the cwt plot)?
Hi Navid, Can you please post so information in relation to both your signal and fs variable? Or better yet attach them? cfs,...

1 year ago | 0

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Answered
Matlab 2020b suddenly not launching
Hi Brunno, Just an idea, however I have had similar issues before. The root cause was always an antivirus killing MATLAB before...

1 year ago | 1

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Trying to do calculations with very large arrays
Hi Daniel, I am a little lost with the explination, however, it sounds like the the full array does not need accessed all at on...

1 year ago | 0

| accepted

Question


Recursive feature selection with function generated from the classification learner app
Hi, I have generated a SVM function from the classifiaction learner app (below). I wish to use the sequentialfs() function to ...

1 year ago | 1 answer | 0

1

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Question


Matching Feature ranking algoritum outputs in classification leaner
Hi, In 2023b within the feature selection algoritum tab of the classification learner app, you can generate feature ranks with...

1 year ago | 1 answer | 0

1

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edfwrite failure because of 8 byte limit
Hi all, I have had a look at the above, from the documentation in edfheader.DataRecordDuration the input should be [a] "Durati...

1 year ago | 0

Answered
Recursive Feature Elimination with Cross-validation
Hi, You can use the sequentialfs() function to preform recusive feature elimination: https://uk.mathworks.com/help/stats/sequen...

1 year ago | 0

Question


Saving data after Running Classification Learner App on HPC with no display
Hi, I am looking to run the Classification Learner app on an HPC running Linux Red Hat Enterprise with no GUI display to use mu...

1 year ago | 1 answer | 0

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Question


communicatingJobWrapper.sh file default location moved in 2022a?
Hi, In MATLAB R2021b, the default location for the communicatingJobWrapper.sh was C:\ProgramData\MATLAB\SupportPackages\R2021b\...

1 year ago | 1 answer | 0

1

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Question


Plot matrix containing negatives in confusionchart() style
Hello, I have a matrix of numbers which includes negitives. I would like to plot this in the same graphical style as confusionc...

1 year ago | 1 answer | 0

1

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Which GPU should I choose for parallel computing(RTX a4500, 4000ada, 4090,4080, 3090Ti,3080Ti...)?
Hi Wang, There are a couple of things to note here, firstly the preformance from a laptop card will never be as good as a deskt...

1 year ago | 0

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Plotting continuous wavelet in 3D
Hi Giovanni, I am very late to the party, but for anyone looking a fuller answer to this, it can be found on the tfridge() docu...

1 year ago | 0

Question


Overcoming VRAM limitations on Nvidia A100
I have access to a cluster with several Nvidia A100 40GB GPU's. I am training a deep learning network on these GPU's, however us...

1 year ago | 1 answer | 0

1

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Fortran compiler for R2022B
Hi Jason, I am not sure if this will help, however the Intel® Fortran Compiler Classic and Intel® Fortran Compiler can be downl...

1 year ago | 0

Question


Deep learning with partitionable datastores on a cluster
Hello, I have a data store which contains 1000 .mat files. Each file contains a X*4 table which has the following format (see a...

1 year ago | 1 answer | 1

1

answer

Question


gradCAM() unclear error message
Hi, I am trying to use the gradCAM() function on my own data (attached). when I run the following command; map = gradCAM(net,...

2 years ago | 1 answer | 0

1

answer

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Un-concatenate a vector to a matrix
Hi Andrew, Reshape() can be a good choice for doing so. Christopher

2 years ago | 1

Question


Tall cell arrays with confusionchart()
Hi, I have trained a deep learning model on a datastore. The datastore is split into three subsets; train, test and validate. ...

2 years ago | 1 answer | 0

1

answer

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Divide annual timeseries to monthly ones
Hi Ancalogon, Having a look at the documentation here; you can just replace hourly with any timestep such as: Time Step 'year...

2 years ago | 0

Question


Cluster multi-gpu training Error: Current pool is not local.
Hello, I am trying to scale up onto a multi-gpu cluster for deep learing. I can run the model on a single GPU on the cluster wi...

2 years ago | 1 answer | 0

1

answer

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Erolling students to Matlab Grader
Hi Branislav, In addition to checking spam, you may also need your school/University IT deparment to add the @mathworks.com ema...

2 years ago | 0

Question


trainNetwork: Cell labels with file/signal data stores
Hi, I have a datastore which consists of ~1000 files. Each file is c*2 cell array, where c represents a number of events of ...

2 years ago | 0 answers | 0

0

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Given below is the code for a radiated electric field as a function of time. I need to take its Fourier transform.
Hi Jasmine, You can use the inbuilt fft() function. Documentation is here. Christopher

2 years ago | 1

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Answered
How can I test the network I've trained?
Hi Ferhat, If you have trained the model it will save to your workspace as a fancy variable 'model'. You can use this to then...

2 years ago | 0

Question


Parallel sever: Request GPU via SLURM
Hello, I have access to an HPC and have been running CPU based code on it for some time now with help from the mathworks team....

2 years ago | 1 answer | 0

1

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License my account with this educational email account.
Hi Nazmul, I think you should still be okay, you can tie your academic email to the campus license programme here. If that do...

2 years ago | 0

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