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Scott MacKenzie


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York University

143 total contributions since 2020

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Answered
How can i plot three periods of a signal
If you want to plot three periods of a signal and do it by extracting the data from your existing code, then t=[0:0.0002:20]; ...

29 minutes ago | 0

Answered
How do i get the sound of a cosine signal
You've only got 100 sample points and the sampling rate is too low. Try this... t=[0:0.2:2000]; xc1=cos(2*pi*493.88*t); soun...

environ 14 heures ago | 1

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Answered
How to take mean of integers value?
You need to use braces because your data are in a table: mean(LSinclination{:,5}) If it's just the integer values you want the...

environ 24 heures ago | 1

Answered
3D Plot from Excel data
OK, let's work with plot3. The relationships in the data might not be a suited to plot3, but this is a reasonable start. It's ...

2 jours ago | 1

Answered
Stacked bar plot, assign "names" to color
Just add labels to your legend: labels = { 'Jack', 'Fred', 'abc', 'def' }; % fill out, as desired legend(labels);

3 jours ago | 0

Answered
How to get all data from m-function?
Your function is defined to only return A (which is perhaps a scalar). To return multiples values, return them as elements in a...

3 jours ago | 0

Answered
subtract value from column in table
You need to use braces: Scan{:,c} = (Scan{:,c}-minus);

3 jours ago | 0

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Answered
Noisy plot after deviation (no sensor)
@Bruce Rogers I added some filtering using MATLAB's smoothdata function. The result is a pretty good sine wave both for velocit...

3 jours ago | 0

Answered
correct use of randsrc function
There are lots of ways to do this, I suppose. Here's what I put together -- with a pesky twist. The weighting is built-in to t...

3 jours ago | 1

Answered
How to find the zero crossing in x and time data sets?
Here's what I put together. The variable fCross is what you are looking for. % data from posted matlab.mat files f = readmatr...

4 jours ago | 2

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Answered
Plotting an amplitude spectrum of a .txt file
This seems to work... % load seismic signal data ss = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_fi...

4 jours ago | 1

Answered
Making two 3D vectors the same length
Given that your question is... How do I pad vector static with zeros at the end so that both vectors are the same dimension?...

4 jours ago | 1

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Answered
the colors red, blue, yellow repeated again in my plot, how I can give each curve in the plot different color
One way is to specify a different color in each call to the plot function: K=1:30; for i=1:10 C_T=i*log(K); plot_T =...

4 jours ago | 0

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Answered
How to create several figures in a subplot with different axes
You're aren't using subplot correctly. For each plot you need a separate call to subplot with the index (in your case, row) whe...

4 jours ago | 0

Answered
Accessing multiple columns in cell array
You need to retrieve the elements in their underlying data type (hence the use of braces) and concatenate the values using brack...

4 jours ago | 0

Answered
How to store data whose dimension varies at each steps of run?
This is a bit long-winded (and can surely be shortened), but I think it achieves what you are looking for: N = 8; % iterations ...

4 jours ago | 1

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Answered
Find a 4-point polygon enclosing scattered points
No doubt this can be simplified, but I think it meets your objective of finding the vertices (4) enclosing the points: % create...

5 jours ago | 1

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Answered
Don't want box plots to overlap...
You only need to use the boxplot function once. Combine the data in a matrix. You'll get a box plot for each column of data an...

5 jours ago | 0

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Answered
How to disable Matlab verbose mode?
warning off verbose

5 jours ago | 0

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Answered
Find the indices of the imaginary element of the matrix
% test matrix A=[1 2 3; 4+i 5 6-i; 7 8+i 9] % identify imaginary elements in A (+1 or -1) B = imag(A)...

5 jours ago | 0

Answered
3D surface plot from 3 columns of excel data?
Here you go... T = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/645855/P3%20data.xlsx'); x = T{:,...

5 jours ago | 0

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Answered
Create new matrix containing only subset of values from old matrix
For the matrix multiplication, use squeeze so both matricies are 24x24, then assign the result to the corresponding 1st dimensio...

5 jours ago | 1

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Answered
Average over particular ranges of one dimension in matrix
% test data data = rand(22,40,24,24); % make the 2nd dimension the 1st dimension d1 = permute(data,[2 1 3 4]); % compute...

6 jours ago | 0

Answered
How to place percent of each bar/bin of histogram on histogram chart in the code below?
Instead of histogram, I suggest you use histcounts along with bar: % test data data = rand(1,1000); hc = histcounts(data); ...

7 jours ago | 1

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Answered
How to do a 2D surface pot as excel graph XY plane isoSAR?
f = figure; f.Color = 'w'; f.Units = 'normalized'; f.Position = [.1 .2 .8 .5]; M1 = readmatrix('https://www.mathworks.com/...

7 jours ago | 0

Answered
Change GridSize of existing non empty TiledChartLayout object
Try using flow for the grid size... tiledlayout('flow'); nexttile; plot([1 2 3],[4 5 6],'-ob'); pause(2); nexttile; pl...

7 jours ago | 0

Answered
how can I save my error term in an array within while loop?
I haven't examined your code in any detail. However, if I understand your question correctly, you simply want to save all the e...

7 jours ago | 0

Answered
I need to fits the attached data as in image
Here's what I put together. This is only for the T5-L5 data. You can repeat this for the rest of the data and build up the plo...

7 jours ago | 0

Answered
What is the matter with this nested looped?
Most likely the problem is with this line for x=n:1 if n > 1, the loop does not execute. Did you mean for x=1:n

8 jours ago | 0

Answered
Random sample, I want the 5% of the data per each hour
There might be a way to simplify this, but I believe the script below achieves what you are after... % read all the data into a...

9 jours ago | 0

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