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Christopher McCausland


Last seen: Today |  Active since 2019

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  • Knowledgeable Level 3
  • 12 Month Streak
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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. ...

1 dag ago | 0 answers | 0

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Answered
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...

14 dagen 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...

17 dagen ago | 1 answer | 0

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answer

Answered
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...

22 dagen 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 ...

22 dagen ago | 0 answers | 0

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Answered
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

25 dagen ago | 1

| accepted

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...

ongeveer een maand 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....

ongeveer 2 maanden ago | 1 answer | 0

1

answer

Answered
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...

5 maanden ago | 0

| accepted

Answered
Box counting method in a tif image
Hi Arlete, If you could share the image that would be great. Having a look at your code the ~ will turn 'c' into a logical ar...

6 maanden ago | 0

| accepted

Question


Datatype duration midnight roll over
Hello, I have a table with a series of categorical events and associated timestamp (duration datatype) at which these events ha...

6 maanden ago | 2 answers | 0

2

answers

Answered
From audio signal to mean of frequency responses
Hi Julia, A butterworth filter can be applied with the butter() command as detailed in the documentation. A more intuative app...

6 maanden ago | 1

| accepted

Answered
how to open st file
Hi Anastasis, Can I ask what you are working on, I am researching a very similar topic and its always good to chat! In terms o...

7 maanden ago | 0

Question


Importing a table as (:,1) timedate (:,2) categorical
Hi there, I have used the import functionality in the past without issue, I am currently trying to import a .txt file which con...

8 maanden ago | 1 answer | 0

1

answer

Answered
Remove a set of intervals from an array
Hi Ciara, There are a couple of diffrent ways to do this, as always it depends on speed vs. understanding. A very understandabl...

8 maanden ago | 0

| accepted

Question


Parrellel server dir() for files local to the server
Hello, I wish to move computation from a local machine with .m files stored locally to a parrellel compute server with the .m ...

9 maanden ago | 1 answer | 0

1

answer

Answered
I want to include a variable in my figure title when I save to a directory.
Hi Sandra, Yes this is possiable, you can either use strcat() to 'build' the title string first or just use title(), it'll look...

10 maanden ago | 0

Solved


add one to x

10 maanden ago

Answered
How to add noise in [0 2] interval to an elements of an array randomly?
Hi Ayberk, Have you tried awgn(r1)? r1Gaus = awgn(r1); Kind regards, Christopher

10 maanden ago | 0

Answered
How can i add variable load to my source
Hi Srikanth, If you want this model to run with respect to time you should inlude a 'clock' block. To get the loads to turn o...

10 maanden ago | 0

Answered
How to create readable decision trees
Hi Awais, I had a similar problem with Markov chains recently. I ended up using digrapgh() to solve the problem, that being sai...

10 maanden ago | 0

Question


pcolor - Numeric Ruler -> limits and scale commands
Hi, I have a cwt figure plotted with pcolor. I can open the property inspector on the figure and manually change the "Scale" pr...

10 maanden ago | 1 answer | 0

1

answer

Answered
Can I add a toolbox to a pre-R2022a installation via the Add-On Manager?
Hi Will, As far as I am aware you still should be able to get the PCT from the add-on manager via the "Install button". Have yo...

11 maanden ago | 0

| accepted

Question


Fixed node locations using graphplot() with Markov chains
Hi, I have developed a few lines of code to generate markov chains from a transition vector ('stagesVec'). The code works well...

12 maanden ago | 1 answer | 0

1

answer

Answered
Finding formants in speech signal
I Piesioslaw, To recalculate your axis have a look at my example below; % Compute a 1024 point fft for my signal ecgcleanNoDC...

12 maanden ago | 0

Answered
How to find elements in an array faster / without using for loop?
Hi Jan, The 'ismember' function should be able to do this! Christopher

12 maanden ago | 1

Question


Truncated SVD returns unexpected 1*1 result
Hi, I am currently prefoming SVD on six channels varying in time of the same type of biometric data. The recorded channels are ...

ongeveer een jaar ago | 1 answer | 0

1

answer

Question


rdann cannot find file on specified path (Physionet wfdb)
Hi there, I am working with physionet data (2018 you snooze you loose compitition) and the wfdb toolbox. I am trying to use the...

ongeveer een jaar ago | 0 answers | 0

0

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Answered
Unable to install the add-on. Try again later.
Hi Vivek, I had the same issue but installed the toolbox manually and it worked fine. Here is a link to instructions on how to....

ongeveer een jaar ago | 0

Question


PCA output gives NaN after normalizing input matrix
Hello, I have an array of 117 features and 125941 observations. I preformed principle component analysis via svd(x) (code below...

ongeveer een jaar ago | 1 answer | 0

1

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