# Les Beckham

Many years developing flight control algorithms and software

**Programming Languages:**

C++, C, C#, MATLAB, Assembly

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**Content Feed**

Fill editfield text value with string from a table

For this specific example, readlines might work better than readtable. DataComments = readlines('file7.csv') Then pick which o...

en dag ago | 0

Why don't the markers have the correct color in the legend?

The problem is that each of your calls to scatter is creating five separate sets of data for a total of 10 sets. But, you only r...

en dag ago | 1

| accepted

How to add seconds to a HH:mm DateTime array ?

datetime objects always have a seconds field. If you don't set it, it will already be zero by default, so you don't need to "ad...

4 dagar ago | 0

how to use previous value in simulink? [(k-1) value]

It looks like what you need to do is remove the new_filtered_V input from your MATLAB function block and add this line at the to...

4 dagar ago | 0

double conditional in one line

You have to join the multiple conditions with a logical operator. For example, the condition 0<x<1 is written like this x=0.23...

5 dagar ago | 0

Saving a struct to a text file exactly how it appears in command window

Here is one approach. path='F:\settings.txt'; settings = struct; %Create structure called settings % settings.exposure_...

17 dagar ago | 1

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Click in the beginning and end of pure tone

Try adding ramps at the beginning and end to avoid the discontinuities of starting and stopping the tone. spl_rms = 60; spl_p0...

26 dagar ago | 0

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My MATLAB code is showing blank plots instead of encrypted and decrypted images. Why? [Help]

You need to convert encryptedImage and decryptedImage back to uint8. This line is converting to double because SBox is double. ...

ungefär en månad ago | 0

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normalization data to 0-255

format long g A = [linspace(1, 10, 10); flip(linspace(3, 100, 10)); rand(1,10)].'; T = array2table(A, 'VariableNames', {'ID', ...

ungefär en månad ago | 0

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Plot line with custom color

This looks a bit jaggedy and dark here, but looks good in my desktop Matlab. If you had read the documentation for plot, you co...

ungefär en månad ago | 0

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i keep getting this error: Error: Function definitions in a script must appear at the end of the file. Move all statements after the function definition to before the ...

You must have some code in your script after the last end that you didn't post. Make sure that the function definition is the v...

ungefär en månad ago | 0

Creating a rectangular patch using random numbers

The chances of four random points in 3d being coplanar are virtually zero. The chances of them forming a parallelogram are infi...

ungefär en månad ago | 1

| accepted

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parenthe

You are missing the multiplication operator in several places. For example: IndexImg((Orientation >= pi/8 & Orientation < pi/4...

ungefär 2 månader ago | 0

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Is there a MatLab online training course that teaches you how to create and use functions?

There is a module in the Matlab Fundamentals online training that concentrates on functions: https://matlabacademy.mathworks.co...

ungefär 2 månader ago | 0

finding a numeric pattern in a vector

Note that I added an additional test at the end of vec to make sure this handles a multi-digit number in the middle position of ...

ungefär 2 månader ago | 0

How to extract specific dates from a datetime table?

whos('-file', 'DATE1.mat') whos('-file', 'DATE2.mat') load('DATE1.mat') load('DATE2.mat') whos head(datet) head(B) found_...

ungefär 2 månader ago | 1

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How do I use xline() to plot values calculated in a for loop?

Your x is going to be symbolic based on the code you posted (you can verify this by using the whos in the Command Window or by l...

ungefär 2 månader ago | 0

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What is the previous syntax for this function?

The strcat function has been around for a long time. strcat("Hello", "World")

ungefär 2 månader ago | 0

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output of two function results

You need to provide two output variables when you call the function. Note that the names you use when you call the function don...

ungefär 2 månader ago | 1

Why are values not rotated?

P = [1 2]*10^7; % made up data to test with S = [1 2; 2 3]; T = [0 70; 0 100]; plot(S(1,:),T(1,:), S(2,:), T(2,:...

ungefär 2 månader ago | 0

Calculate the temperature distr

First of all, format your code (type Ctrl-A then Ctrl-I) in the Matlab editor. Second, add more comments. For example, is m ...

ungefär 2 månader ago | 0

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Factorial using a for loop

Your code works fine (though I would add semicolons to the end of all lines except the for and end to avoid spewing a bunch of s...

ungefär 2 månader ago | 2

read several csv files with space in the name format

i = 1; filename2 = strcat('opt.w.matrix.reg. ',int2str(i),'.csv') As you have seen, strcat strips leading and trailing spaces....

ungefär 2 månader ago | 0

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remove decimals from title when using sprintf

Q=2021; %year x = 0:10; y = x.^2; plot(x,y) grid on title(sprintf('text %d',Q)) % <<< replace %f with %d

ungefär 2 månader ago | 0

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Error using .^ not enough input arguments

Perhaps you meant this instead % L = integral( sqrt(1+{power(dy/dx),2}),x1,x2); % ^ ^ remove...

ungefär 2 månader ago | 0

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Most readable syntax to fill table in a for cycle

There probably isn't a significantly cleaner way to do this. See below for a way to suppress the warnings. format short e x =...

ungefär 2 månader ago | 0

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How do i do x1<=x<=x2 in matlab?

You have to split up the compound condition into two conditions: (x1 <= x) && (x <= x2) If these terms are scalars, that will ...

ungefär 2 månader ago | 0

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Formatting read data from text files

text_data = fileread('Question.txt'); disp(text_data)

2 månader ago | 1

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How can I save an animated plot as a GIF?

Check the answer to this question: https://www.mathworks.com/matlabcentral/answers/94495-how-can-i-create-animated-gif-images-i...

2 månader ago | 0

animated sine wave continously

This should get you started. Adjust as desired. Note that the animation won't show here, but I tested it my local copy of Matl...

2 månader ago | 0

| accepted