# Jan

It is easier to solve a problem than to guess, what the problem is. Questions about FileExchange submissions are welcome - get my address from the code. I do not answer mails concerning questions in the forum.

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**Content Feed**

Solution Codes of Ordinary Diferenatial Equation

What is the purpose of the outer loop "for p=1:k"? Why does the inner loop "for n=0:p-2" run from 0 to p-2? It is confusing tha...

6 hours ago | 0

Problems accessing files from code after moving a matlab project from uni pc to home

Do not call fopen without checking for errors: [fid, msg] = fopen(file, 'r'); assert(fid > 0, 'Cannot open file for reading: %...

7 hours ago | 0

How to sort a dot indexed array by rows based on one column

[~, index] = sort([pop.F]); pop2 = pop(index);

7 hours ago | 0

how to use read variable

T = readtable('Population_data.xlsx'); population = T{:, 3};

1 day ago | 0

How can I create a plot with two different yaxis, with one of them inside the figure?

Simply create 2 axes: FigH = figure; Axes1H = axes(FigH, 'Position', [0.1300 0.1100 0.5 0.8150], ... 'Box', 'on'); ...

1 day ago | 0

Best way to initialize different parameters based on the machine in which I run the code

Matlab's setpref and getpref command is very useful also to store machine specific parameters. A drawback is, that these settin...

1 day ago | 0

i want to Write a user-defined function that calculate total marks, out of 100,The course should include homework, midterms, and final exam and i dont know why didint work

if (95 >= Gall) Read this loud: "If 95 is greater than Gall". No, you want the other way around: if Gall >= 95 The ...

1 day ago | 0

How to filter the following vector from multiple vectors?

Maybe: V = MM(:, abs(MM(2, :)) < 32); [~, index] = min(V(1, :)); W = V(:, index)

2 days ago | 0

Within a script, can I close or redirect a Windows File Explorer window opened with 'winopen'?

You could open a tree view to the folder inside Matlab: [mtree, container] = uitree('v0', 'Root','C:\') % Still working? This...

2 days ago | 0

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Two complex matrix can not to multiply by each other.

Try this: https://www.mathworks.com/matlabcentral/answers/1584284-the-problem-of-conv2-with-blas-loading-error

2 days ago | 0

Compare two string arrays with a if loop

A simpler formulation of your question might be: Datenbank = [ ... "Na,Pb" "Abellaite" ""; ... "...

2 days ago | 0

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Powell's Algorithm not obeying Upper Bound (UB)

Yes, this is the documented behavior: % Lb, Ub: lower and upper bound vectors to plot (default = x0*(1+/-2)) Lb and Ub are u...

2 days ago | 0

Function 'subsindex' is not defined for values of class 'cell'

What is the purpose of handles.edit1.String(TIP1) Here TIP1 = {'ITS A GREAT CAR'} is used as index of the variable replied by ...

3 days ago | 0

When I run a specific MEX file I get the message: "Invalid MEX file: The specified module could not be found". The dependency_walker utility seems not to work.

Open the DependencyWalker with a double click. Then select the mex file manually. This should show the report after some seconds...

3 days ago | 0

Why am I receiving the error message "Array indices must be positive integers or logical values"?

ch_i(exp(-(z/ch_i))) ch_o(exp(-(z/ch_o))-1) Here exp(-(z/ch_i)) and exp(-(z/ch_o))-1 are used as indices of the variables ch_i...

3 days ago | 0

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I want to make an iteration for all arras of my vector.

n=ones(size(f_s)); ready = false; while ~ready nOld = n; ... Your code as above ready = all((n - nOld) < 0.01) ...

4 days ago | 0

| accepted

Invalid RHS for assignment to a categorical array.

Group_Train1 is a [274x1] double vector. u contains its unique elements. result is an empty categorical. The error message mean...

5 days ago | 1

| accepted

Error compiling third party plugin

"I navigated with Matlab to the libeep folder" - the provided command is not Matlab. Did you install XCode? Then open a command...

5 days ago | 0

How to read audio file from file?

The error message tells clearly, that there is no file called 'D:\BİTİRME PROJESİ\TIMIT\data\TRAIN\DR2\FAEM0.SA1.wav' There i...

5 days ago | 0

How to correct the code?

for k = 1:size(lambda) fun_lambda_value(k) = subs(f,[x1,x2],[x_1(i)+lambda(k,1)*S(1),x_2(i)+lambda(k,1)*S(2)]) end If lamd...

5 days ago | 1

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How do I add numbers into a sequence

x = [1;10;30]; y = x.' + (0:9).'; y = y(:)

5 days ago | 0

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PARFOR in real applications

After trying many examples from many questions in the forum, I've found: https://www.mathworks.com/matlabcentral/answers/172017...

5 days ago | 0

Perform specific operations on arrays without "for" loop

You do not want less for loops, but more: Accesing the RAM is slower than using the CPU cache: function [chi,zeta,M,O,Delta,rho...

5 days ago | 2

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I would like to know how I can find out how long a certain event lasts.

data = [ ... 0.019 0 0.04 0.45371 0.057 0 0.076 0.15127 0.092 0.22037 0.107 0.2317 0.1...

6 days ago | 0

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what is this eror and what does it mean and how can i solve it ?

it says here that ('loop index 'i' is changed inside of a FOR loop) Yes, and this is the clear explanation already. Do not chan...

7 days ago | 0

How can I add an extra dimension to make the array 2D to 3D?

Reduce the clutter: name = ''; if idx < 10 name = strcat('0',int2str(idx),'.mat'); load(name); else name = str...

8 days ago | 1

| accepted

Trying to use central difference scheme to solve logistic equation

Your code is no valid Matlab code. I suggest to learn the basics from: https://www.mathworks.com/learn/tutorials/matlab-onramp.h...

8 days ago | 0

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using matlab compiler to read a .mat file at run time

Consider, that pwd is fragile. Any subfunction might change the current directory. See here for a method to get the location o...

8 days ago | 0

How can I write a fraction inside string?

What exactly is the problem? I've simply copied the string provided in the question, inserted a linebreak \n to let the comnplet...

8 days ago | 0

| accepted

where can i get original Matlab code of an algorithm published in a research paper?

Ask the author of the paper. Sometimes they provide the code. Don't be surprised, if the code does not run on your computer. I'...

8 days ago | 0