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Les Beckham


Last seen: Today |  Aktiv seit 2013

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Many years developing flight control algorithms and software

Programming Languages:
C++, C, C#, MATLAB, Assembly

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Beantwortet
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_...

7 Tage vor | 1

| akzeptiert

Beantwortet
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...

16 Tage vor | 0

| akzeptiert

Beantwortet
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. ...

21 Tage vor | 0

| akzeptiert

Beantwortet
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', ...

28 Tage vor | 0

| akzeptiert

Beantwortet
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...

28 Tage vor | 0

| akzeptiert

Beantwortet
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...

28 Tage vor | 0

Beantwortet
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...

etwa ein Monat vor | 1

| akzeptiert

Beantwortet
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...

etwa ein Monat vor | 0

| akzeptiert

Beantwortet
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...

etwa ein Monat vor | 0

Beantwortet
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 ...

etwa ein Monat vor | 0

Beantwortet
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_...

etwa ein Monat vor | 1

| akzeptiert

Beantwortet
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...

etwa ein Monat vor | 0

| akzeptiert

Beantwortet
What is the previous syntax for this function?
The strcat function has been around for a long time. strcat("Hello", "World")

etwa ein Monat vor | 0

| akzeptiert

Beantwortet
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...

etwa ein Monat vor | 1

Beantwortet
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,:...

etwa ein Monat vor | 0

Beantwortet
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 ...

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
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...

etwa 2 Monate vor | 2

Beantwortet
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....

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
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

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
Error using .^ not enough input arguments
Perhaps you meant this instead % L = integral( sqrt(1+{power(dy/dx),2}),x1,x2); % ^ ^ remove...

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
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 =...

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
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 ...

etwa 2 Monate vor | 0

| akzeptiert

Beantwortet
Formatting read data from text files
text_data = fileread('Question.txt'); disp(text_data)

etwa 2 Monate vor | 1

| akzeptiert

Beantwortet
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 Monate vor | 0

Beantwortet
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 Monate vor | 0

| akzeptiert

Beantwortet
saving workspace variables individually?
a = 1; b = 2; c = 3; vars = who for v = 1:numel(vars) save(sprintf('%s.mat', vars{v}), vars{v}) end dir

2 Monate vor | 0

| akzeptiert

Beantwortet
Color in plot from Table
Just a couple of issues. You need column vectors to insert into the table, and you can only have a scalar string or char vector...

2 Monate vor | 0

Beantwortet
Convert C code to Matlab code for reading binary file
Your Matlab struct doesn't match the definition in the C code. For example, the third element is a char array of 100x1000 in th...

2 Monate vor | 0

Beantwortet
Saving a structure array, not fields of it
s1 = struct('a', 1, 'b', 2') save('s1.mat', 's1') % don't use the '-struct' option clearvars whos load('s1.mat') whos Anot...

3 Monate vor | 0

| akzeptiert

Beantwortet
Find column number for every row in matrix
A = [ -1 4 1 1 -1 -1 -5 4 -1 ]; [row, col] = find(A > 0) [~,idx,~] = unique(row, 'first...

3 Monate vor | 0

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