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Christopher McCausland


Last seen: Today Active since 2019

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  • 12 Month Streak
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  • Knowledgeable Level 2
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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 ...

environ un mois 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...

environ un mois ago | 0

Solved


add one to x

environ un mois 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

environ 2 mois 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...

environ 2 mois 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...

environ 2 mois 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...

2 mois 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...

2 mois 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...

3 mois 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...

4 mois 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

4 mois 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 ...

4 mois 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...

4 mois ago | 0 answers | 0

0

answers

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....

4 mois 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...

5 mois ago | 1 answer | 0

1

answer

Answered
student license and simpower library
Open matlab -> Add-ons -> SimScape Electrical/ Simscape power systems (is what I think you are looking for)

5 mois ago | 0

Question


Principle Component Analysis/ Singular value decomposition; great with ovariancancer dataset terrible with my data
Hello, I am currently getting to grips with PCA, I came accorss a great tutorial from Steve Brunton on its use with matlab. Thi...

5 mois ago | 0 answers | 0

0

answers

Answered
When using the 1D convolution example code from MATLAB am getting an error about incorrect use of '='.
Hi Joseph, If you have a look at the docuementation it calls for named pairs for input, this would look something more along th...

5 mois ago | 0

Answered
Word recognition power frequency domain
Hi Leon, From what I can understand you are looking for the local maximums, however this returns vectors of varying lengths? ...

7 mois ago | 0

| accepted

Question


Table of Tables or cell of Tables
Hi, I am preforming machine learning on 13 channels of data and am currently at the feature extraction stage. I have created 13...

7 mois ago | 1 answer | 0

1

answer

Question


3D array, remove columns where second array == -1
Hi, I am curently processing 13 channels of PSG data. I take my data and create 10 second buffers with 5 second overlaps for th...

7 mois ago | 1 answer | 0

1

answer

Answered
sample Matlab COM object for C# .NET Framework application
Hi, The MATLAB documentation has lots of examples and documentation to get you going. Here's a link to an example. And a se...

7 mois ago | 0

Question


Array prealocation - Extra array of zeros in 3D array
Hi, I have a 13 channel signal recorded over several hours. I wish to take all channels, split them into 10 second windows wit...

7 mois ago | 1 answer | 0

1

answer

Answered
How to know the gain value used in this controller when I know the input and output of the pid controller
Mathematically speaking gain is the output divided by the input of a system. The next question is if this produces a linear or n...

8 mois ago | 0

Question


Plot - Remove axis ticks but keep grid lines
Hi, I am producing a graph to view open source polysomnography data. I have several arrays in one plot window with an offset be...

8 mois ago | 1 answer | 0

1

answer

Answered
B-spline fit of airfoil coordinates
Hi Marco, Thats a really cool problem! Looking at it I would assume that the resoloution between x = 0 and x = 0.01 is not gr...

9 mois ago | 0

Answered
How to export live script to latex beamer document class?
Hi @Barbab, One soloution maybe to use mcode if you are not already doing so. I would also suggest taking a look at implementin...

9 mois ago | 0

Answered
How to let Matlab show large trends in Nyquist Plot?
Hi Zizhuo, You are correct, considering a system L(s); where L(s) has two poles at the origin, will give a 360 degree colocwis...

10 mois ago | 0

Answered
Problem with readtable MATLAB R2020a+
Hi Paolo, I am hoping I have an answer for you however I am working in MATLAB 2020b, it is post 2020a so I think the changes s...

11 mois ago | 0

Answered
Create a grouped boxplot
Hi NA, From the documentation here (See section boxplotGroup(__,'primaryLabels',c) ) the number of primary lables should matc...

11 mois ago | 1

| accepted

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