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Les Beckham


Last seen: Today Active since 2013

Many years developing flight control algorithms and software

Programming Languages:
C++, C, C#, MATLAB, Assembly
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Answered
Why a condition like If (~Input) changes to a complex condition with ternary operator ?
So, the original condition if (~Input) is C code and not Matlab code? If so, you should use the logical not operator which is !...

1 day ago | 0

Answered
Using the listdlg function
You probably just need to wrap your switch/case processing in a for loop. For example: s = listdlg('ListString', {'One', 'Two'...

2 days ago | 0

Answered
anticlockwise points coordinates sorting
A = [0 0 ; 1 0.2; 0 1 ; 0 0.6; 1 0 ; 1 1 ; 0.6 1; ...

11 days ago | 1

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Answered
How to use subplot in a UIFIGURE?
When you post a question that states that you are getting error(s), you should post the complete text of the error message (ever...

16 days ago | 0

Answered
Text in editor window suddenly vanishes in R2022b.
I would definitely do a SaveAs to another filename in case the data is still there but just not showing. Use a different filena...

16 days ago | 0

Answered
Remove text after a symbol
If the titles are character vectors in a cell array: titles = ... { 'Bohemian Rhapsody - Remastered 2011' '(I Can''...

16 days ago | 0

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Answered
How to permanently disable warnings in MATLAB editor?
I believe you can do that by un-checking the "Enable integrated warning and error messages" checkbox under the Code Analyzer opt...

17 days ago | 0

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Answered
Cumulative distance vs time graph using a velocity vs time graph
You need to save the value of integ on each step of the integration. See changes below marked with % <<< clc; clear; close; ...

18 days ago | 0

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Answered
how to get the same result using rand
The documentation for rand states that it returns values "drawn from the uniform distribution in the interval (0,1)". If you wa...

29 days ago | 2

Answered
How do I replace one data column from a text file to the data column of another text file
rch = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1175438/outputrch.txt', ... 'HeaderLines', ...

1 month ago | 0

Answered
sum of time series performace
Your question isn't very clear but it appears that perhaps you want to do a moving average. Take a look at the documentation fo...

1 month ago | 1

Answered
Reading in a text file with numbers and strings in
Try using readtable instead of readmatrix. This will read in the strings properly and allow you to do your cleanup based on the...

2 months ago | 0

Answered
Extract numbers from char type
Or, in one line of code: s = '4.64 km'; num = sscanf(s, '%f') % num will be a double

2 months ago | 0

Answered
Hold a value indefinitely once a condition becomes true
One way would be to route the output of the relational operator to two places: (1) a summing junction or an OR block, and (2) a...

2 months ago | 0

Answered
How to have Logging in Matlab
Perhaps the diary command will do what you need. An excerpt from the documentation linked above: When logging is on, MATLAB® c...

2 months ago | 0

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Answered
Plotting patters using circles and a trignometric equation
k = 1:14000; a = pi*k./14000; Xk = cos(10*a).*(1-0.5*cos(16*a).^2); Yk = sin(10*a).*(1-0.5*cos(16*a).^2); Rk = 1/200 + 0...

2 months ago | 1

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Answered
How to remove comma from numerical data
Copy this text and paste it into a text editor. Then search and replace all of the commas with nothing. Then run that modified...

2 months ago | 0

Answered
How to use data in a script from a function in another.
% Example script NewBricks = UseBrickData(); % Call the function and assign the return value to the variable NewBricks disp(Ne...

2 months ago | 0

Answered
How to view an mlx file without using MATLAB
You can "Save as..." an mlx file to pdf, docx, html, or latex but you lose the interactivity. You will get a static "snapshot" ...

2 months ago | 1

Answered
How schould the matlab function be to hold an signal between two values?
Perhaps something like this in a MATLAB Function block? function out = determineStatus(in) persistent out if isempty(out) ...

2 months ago | 1

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Answered
How can I set x ticks for every curve in the subplot, legend for every curve and a title for the whole figure?
It looks like it works just fine except for the legend. Instead of legstr= "\theta_1_/_2 = "+(5)+"°"; try this legstr= "\th...

2 months ago | 0

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Answered
Automatic change of legend's arguments
labels = {'A','B','C'}; for i = [1 3] h(i) = plot(rand(10,1), 'DisplayName', labels{i}); hold on end grid on legen...

2 months ago | 1

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Answered
How to adjust the position of the x-axis ticks and put the angle degree on the values of the x-axis ticks?
Vec_MIS = [0.238000000000000,1.18980000000000,2.14160000000000,4.99700000000000,6.90070000000000,10.7079000000000,14.51520000000...

2 months ago | 0

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Answered
Generate a sinus signal and plot the output
Your tmax is huge so you are plotting many many thousands of cycles. Also, stem clutters up the plot with circles on every data...

2 months ago | 0

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Answered
How do you change the transparency of multiple lines using "plot" if the lines are all different colors?
h = plot(rand(5)); % example plot. When you make your plot be sure to capture the handle % now set the alpha on all the lines ...

2 months ago | 0

Answered
Rounding towards zero or from zero
There is no tie involved in rounding 3.6. If you wish, you can use floor instead: floor(3.6) If x was 3.5 instead, that would...

2 months ago | 0

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Answered
Is it possible to have a file that changes it name depending on another variable?
Try this: % Button pushed function: SaveButton function SaveButtonPushed(app, event) PatientID = app.PatientI...

3 months ago | 1

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Answered
Condense code in Split string operation
If you put the filename in a string instead of a char vector you can do it in one line s = "xxx_yyy_zzz.xlsx" extractBetween(s...

3 months ago | 1

Answered
increasing amplitude of sine wave
Fs = 44100; dt = 1/Fs; StopTime = 3; t = (0:dt:StopTime-dt)'; Fc = 3000; A = linspace(0, 1, numel(t))'; y = A.*sin(2*pi*Fc...

3 months ago | 0

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Answered
How to search for previous values in a table?
This should do what you want. Note that the cell array in this case only has one cell because there are only two timestamp rows...

3 months ago | 0

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