Christopher McCausland
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Accept 5 answers given by other contributors
Awarded to Christopher McCausland on 11 Nov 2021
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Content Feed
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? ...
28 days 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...
28 days ago | 1 answer | 0
1
answerQuestion
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...
29 days ago | 1 answer | 0
1
answersample 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...
1 month 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...
1 month ago | 1 answer | 0
1
answerHow 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...
2 months 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...
2 months ago | 1 answer | 0
1
answerB-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...
3 months ago | 0
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...
3 months ago | 0
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...
5 months ago | 0
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...
5 months ago | 0
Create a grouped boxplot
Hi NA, From the documentation here (See section boxplotGroup(__,'primaryLabels',c) ) the number of primary lables should matc...
5 months ago | 1
| accepted
How to normalize data?
Hi Seval, Normalising data has several diffrent meanings statistically speaking. I am guessing given the mention of the Y colum...
6 months ago | 0
FIR Filter delay for Realtime Signal Processing
Hi Ghazian, Your question is more about sampling theroy than matlab. Using an FIR filter will intorduce group delay to the sig...
7 months ago | 0
how to plot all points
Hi Vedang, Before considering my answer below you should know that there are more efficent methids to do this. However as you ...
7 months ago | 1
How i will draw circle around specific point in 3D model
Hi Radoslaw, There are a couple of similar questions that answer your question. Here is a link as to how to plot circles. I a...
7 months ago | 0
| accepted
How to upsample a picture with initial values?
Hi Benat, MATLAB as an inbuilt function to do this for you. Let me know if you need any other help. Christopher
7 months ago | 0
| accepted
Question
Remove rows from table identified in a second string array
Hi, I have a table of results, called Results which is 505x11. The first column is Results.Filename and gives an asociated str...
8 months ago | 2 answers | 0
2
answersStore values from while loop into an array
Hi Jacob, I am not sure what u and v are suppsosed to look like, if you could give some data that would be great! I have been ab...
8 months ago | 0
| accepted
Index in position 1 exceeds array bounds
In your code in line 22 you have resb=resids(bidx(bb,:),:); where as with any index resb=resids(A,B). MATLAB is trying to tell...
8 months ago | 0
pull_up_down in Matlab
Hi Sapir, In MATLAB there is a "configurePin" command which can enable the pull up resistor. Here is the link to the documentat...
9 months ago | 0
Can I use Matlab/Simulink to replace our current CFD?
Hi there, MATLAB is a great and versatile programe that can acheive many things, CFD being one of them. I am currently working...
9 months ago | 0
how can I show all of my data in the legend for each curve?
lgd is outside the for loop with no buffer array to hold the data. This is why only the last value is being displayed. While thi...
9 months ago | 0
Detect the error position in a vector and correct it (Matlab)
Hi Afluo, You can try something like the below to assess where the diffrences between the arrays are; after this just cycle to ...
9 months ago | 0
| accepted
Writing an audio file
Hi Grant, It's been a while from I have used .wav files for ECG recorings. I think you are on the right track with your first a...
9 months ago | 1
MATLAB APP: Create a "log" box
Hi William, There are a few options to do this, if you are using the matlab app designer take a look at uitab and uipanel. Th...
9 months ago | 0
Sampling of a Sine wave.
Hi Ketan, I have ran the code an everything looks corrrect to me. If I understand the question correctly you are asking more ...
9 months ago | 0
Scatte plot to contour plot xyz data.
Hi, Have you tried Contour3 for three dimentional contour plots? You should be able to plot a secondary graph from this. c...
9 months ago | 0
Spline Error - The first input must contain unique values
For anyone that finds this, I was able to determine my own issue. In the array of 300000 data points two concurrent data points ...
10 months ago | 2
| accepted
Question
Spline Error - The first input must contain unique values
Hi, I am proccessing data from the physionet Staff III database. I take the data, apply a bandpass filter and then apply cubic ...
10 months ago | 1 answer | 1
