Community Profile # 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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Load .txt file into matrix form
That looks like a good candidate for readmatrix. mtx = readmatrix('X_deg_10.txt'); size(mtx)

1 dag ago | 0

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what's the index exceed error?
On the second pass through the for k = 1:20 loop, you are trying to access the second row of sig, but it only has one row.

3 dagen ago | 0

How can I import this data with a for loop?
You were very close. x = [3 5 7 9 11 12 14 15 16 17]; for i = 1:numel(x) fn = sprintf('PendulumTestData/TD%d/IK/HR_1.mot'...

4 dagen ago | 1

Adding zeros to a column vector to match a larger column vector
new_x= [x; zeros(length(y)-length(x), 1)]; % ^ ^ switch the arguments to zeros % use ...

5 dagen ago | 0

Plots: aligning categorical y-axis labels
% create dummy data y = [1,2,3]; x = [5,10,20]; err = 0.5*ones(size(y)); % draw plot figure(1) yyaxis right errorbar(x,...

5 dagen ago | 1

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Resolution of plot code errors
Why are you trying to do this with symbolic variables? It works using simple numeric variables. x = linspace(-5, 5, 500); y =...

8 dagen ago | 0

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Issue with delete(obj)
Here are some modifications that should get you closer to what you wan't. Note the comments I've added in the code to point out...

10 dagen ago | 0

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for loop does not iterate
Array indices in Matlab must be positive integers (or logical). You are trying to us xroots, a vector of complex numbers as the...

18 dagen ago | 0

How to save the result of each loop separately
Perhaps this (using a cell array)? y = [3 4]; for i = 1:length(y) x{i} = zeros(y(i), 2) end

18 dagen ago | 1

How would I plot this and then achieve minimum and maximum.
x = 0:0.1:15; % y=(x)^3/3-11(x)^2/2+24x << you were missing multiplication operators * % and the powers need to be .^ (element...

18 dagen ago | 0

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Hexadecimal Data Convert to signed int32
The hex2dec function assumes unsigned integer unless you tell it otherwise. You can either typecast the unsigned result to sign...

18 dagen ago | 2

wildcard in filename for readtable does not work
You must call readtable with a valid filename for an existing file. It will not accept wildcards. You could use uigetfile to o...

19 dagen ago | 0

Indexing with min and numel
vector1 = 1:5 vector2 = 2:7 N = max(numel(vector1), numel(vector2)) [n,I] = min([numel(vector1),numel(vector2)]) I'm not sur...

22 dagen ago | 1

In your SEGMENT 1 code you have this line where you are updating time (even though the comment says "Height Update"). I don't s...

22 dagen ago | 0

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how to plot signals on the same scale
For the green one, just subtract the first element of the capacity vector from the entire vector in your plot command. For exam...

23 dagen ago | 1

how to obtain the data from the middle of the binary file using fread in MATLAB?
The second argument to the fread function is the size of the data to read, not an index, as you appear to be trying to use it. ...

23 dagen ago | 0

how to import file?
You were pretty close. Here is one approach, converting your third columns to arrays instead of extracting them as tables with ...

23 dagen ago | 0

While loop in function
Perhaps you meant to test the absolute value of epsilon_a? %known veriables syms x f(x) = exp(-x) - x; eqn = f(x) == 0; mat...

23 dagen ago | 0

Determine the relational operator in an expression
If you can rely on x always being on the left in your "test" expressions, you can test for y being on the left in the result ret...

23 dagen ago | 0

I want to plot parameters and time , with influence three others paramaters , but i dont know how to plot
Note that, in Matlab, functions must be defined at the end of a script. Your code seems to run just fine after reordering it. ...

25 dagen ago | 0

Piecewise function graph help
Use logical indexing: L = 200; d = 10; s = 30; r1_max = 22.36; r2_max = 120.4; r = 0:200; F = zeros(size(r)); idx ...

25 dagen ago | 0

how to zero pad a vector to have the same amount of data as a vector with more data?
Try this: %%% goal: to have the length of 'in' equal the length of 'verb' %%% define inputs [in, fs] = audioread('smash_...

26 dagen ago | 1

printing the name of the data containing a certain value in the workspace
a=10; b=20; c=30; d=40; reference=20; names = ["a", "b", "c", "d"]; [max_delta, idx] = max([a b c d] - reference); fp...

26 dagen ago | 0

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XTicks change in tiled figure if no breakpoint is set before for loop, even if xticks are used
I can't explain why your approach didn't work, but this seems to work. figure tiledlayout(3, 3); percent = 0:100; ticks = 0:...

29 dagen ago | 0

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How do i find x from given y that is closest to my peak or at x=0?
Have you tried interp1?

ongeveer een maand ago | 0

Convert z to e^(-sT) in transfer function
If you have the Control System Toolbox you can use the d2c function to convert from the z domain to the s domain. Note that thi...

ongeveer een maand ago | 2

How to extrapolate the first 5 points
load points.mat plot(points(:,1), points(:,2), '.-'); grid on figure plot(points(:,1), points(:,2), '.-'); grid on xlim([1...

ongeveer een maand ago | 0

Wrong symbolic solution for trigonometry
It looks like your second solve construct only returns one of the solutions. Someone who knows the symbolic toolbox better than...

ongeveer een maand ago | 0