Community Profile # Les Beckham

Last seen: Today Active since 2013

Many years developing flight control algorithms and software

Programming Languages:
C

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What is this center line when I create m file from mlx file?
I believe that what you are seeing (if you are viewing these in the Matlab editor) is the "Right-hand text limit" line. You can...

2 dagar ago | 0

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How to Extract 2048 values containing the maximum value?
Note that this plots the group that contains the maximum datapoint in all of the data. It does not "plot the largest 2048 value...

2 dagar ago | 1

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How to find the zero vaue of a plot?
X=[0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20]; Y=[-0.88 -0.7489 -0.6178 -0.4867 -0.3556 -0.2245 -0.0934 0.0378 0.168...

2 dagar ago | 1

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Display time before the prompt arrows
See this utility on the File Exchange: https://www.mathworks.com/matlabcentral/fileexchange/26471-setprompt-set-the-command-win...

3 dagar ago | 1

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How to do the example below in MatLab? I am dealing with same sort of problem in matlab
Something like this should do what you want (using made up example data): % simulating read of csv file1 (replace by data1 = re...

14 dagar ago | 1

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Where is the error in my code?
You need to specify an increment size if you expect r to be a vector. Currently it is a scalar equal to zero. Q will not be a ...

23 dagar ago | 0

help on graph (w/o common matrix plotting built-in functions)
In that case, maybe something like this will get you close. A = randi(2,10,365)-1; x = 1:size(A,2); y = size(A,1):-1:1; for ...

ungefär en månad ago | 0

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help on graph (w/o common matrix plotting built-in functions)
A = randi(2,10,365)-1 str = repmat(' ', size(A)); str(A==1) = '-'; disp(str)

ungefär en månad ago | 1

Reveresing the order of columns in an array
% Note: use semicolons instead of commas for row breaks so you get 4 columns q = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16; 17...

ungefär en månad ago | 0

Recognise specific pattern in timetable
One approach without requiring the Signal Processing Toolbox: load('answers.mat') % an approximation of your data x = data(:,1...

ungefär 2 månader ago | 0

Extracting 2 Far right characters
One approach that generates a cell array: tt= {'United Kingdom TR';'United Kingdom SR';'United Kingdom WR';'Worldwide TC'}; c ...

ungefär 2 månader ago | 0

How to Rescale X Axis in Plot
Since you didn't show the code you used to generate the plot or include the data, I'll have to guess what the problem might be. ...

ungefär 2 månader ago | 0

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'Replace' shortcut in editor for R2022
Ctrl-H

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calculate time from alarm (variabel x) to event (variable y)
Try this t = [0;10;20;30;40;50;60;70;80;90;100]; % in sec; variables are generated every 10 seconds alarm = [0;0;1;0;1;0;0;1;...

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This should work for any number of columns and it automatically detects the number of header rows and the variable names. t = r...

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How do I resolve these two lines separately?
Another approach B=rand(3,5) A=[0 0 0 1 0;1 1 1 0 0;1 0 1 1 0] idx = B > 0.6 A(idx) = ~A(idx)

Count number of words per row in a string
In 2020b or later you can also use a pattern with a regex pattern to find (and count) words. It took some experimenting to get ...

Can yous tell me this block in Simulink
That looks like the XY Graph block, perhaps. It normally isn't orange, however.

Calculating u and v components from wind direction and speed
Actually, it is straightforward. v (North (y) component) and u (East (x) component) can be calculated from S (wind speed) and D...

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How do I calculate the acceleration using only 3D distances?
load acc_dist.mat xyz = cell_of_double_pre_ballsCopy{1}; dxyz = diff(xyz); % difference between adjacent points in xyz coordin...

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Plot is not showing anything.
Replace your loop with h= 0.1; %step size for loop t = 0:h:1; for i = 1:numel(t) xt(i) = X0*exp((-S)*wn*...

How can I use a variable for formatting?
You can also use %*d, like this for k = 1:5 fprintf('%*d\n', k, 2*k); % the first argument (k) is the field width, 2*k is ...

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Is there a bug in imread() or imfinfo() with multiframe GIFs in R2021a/b?
Output of your test script theonlymap = 1.0000 0.0824 0.9137 0 0 0 0 0 0 0 0 ...

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How to Create/Modify for matrices or matrix
K=5; matA = 1:K matB = repmat(matA, 1, K)

3D Profile Extrude
x = [82, 80, 65, 38, 82]; y = [82, 54, 36, 94, 82]; x = repmat(x, 10, 1); y = repmat(y, 10, 1); z = (1:10)'; z = repmat(z, ...

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Damping and natural frequency
The damping ratio that you calculated is greater than one, meaning this system is overdamped (non-oscillatory). It has two real...

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Matlab graph is not drawn
You aren't incrementing k or creating t in your loop. There are also other things wrong with your calculation of x. For one th...

Try and Catch for multiple conditions
Maybe something like this: if isfield(src, 'DeviceName') Name = src.DeviceName; else Name = 'unknown'; % or, just do...

Matlab is not recognizing the graph(...) function.
The graph function was added in release 2015b. See doc page here (the info on when it was introduced is at the bottom): https:/...