# 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**

check ismember for each element individually

You want to get a logical vector for each element, which is TRUE for the matching elements. Then this is efficient: a = [1 2 3 ...

etwa 8 Stunden ago | 0

| accepted

How do I run a custom function when my toolbox gets installed?

How is the toolbox "regularly distributed"? It is usual, that a toolbox or software has a "configure" function to set up the en...

2 Tage ago | 0

how to implement this in a better way or what is the mistake

Use the debugger: dbstop if error Run your code afterwards until Matlab stops at the error. Then check: size((xs-X)/r) size(...

2 Tage ago | 0

Applying 'if' condition within location-dependent thermal Properties

After defining ro_ult = @(location,state) ro_d-(ro_d-ro_s)*exp(location.y/0.06); ro_ult is a function handle, which expects tw...

2 Tage ago | 0

add different number of zeros in the beginning of a matrix

The output cannot be a matrix, as Dyuman Joshi told you already, because in a matrix all rows must have the same number of eleme...

3 Tage ago | 1

How do i end my code

You have showed some code, which runs once only. The output shows, that this function is called again afterwards, but we do not ...

3 Tage ago | 0

How to use the MATLAB radio button to switch between 2 matrices

Check the value of the radio buttons in the callback, which starts the computations. Then use the wanted matrix accordingly. A ...

3 Tage ago | 0

How to simply the code

With some guessing: Value = cat(1, C{:, 2}); Index = find(Value >= 2, 1, 'first') - 1; if ~isempty(Index) % [EDITED] T...

3 Tage ago | 0

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non linear coupled diff equation

What about simplifying the equations? 1. dx/dt = -(r+r1)/L1*x - dy/dt * (L12/L1) 2. dy/dt = -y*r2 - dx/dt * (L12/L2) 1. int...

3 Tage ago | 0

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Indexing every value from matrix not only unique values

Of course you can use find(): A = [2, 2, 4, 1, 3; ... 3, 1, 10, 100, 200]; % 200 added to match number of elements per ...

3 Tage ago | 1

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Converting text file to struct

Your text file is almost valid Matlab code: only the trailing semicolons are removed. Now you try to write some code, which inte...

3 Tage ago | 1

how to Concatenate big string matrices of different sizes

With some bold guessing: % [UNTESTED] Please povide a small test data set keyIndex = 1; % Guessing, that the "case number" ...

3 Tage ago | 0

Unable to perform assignment because the size of the left side is 1-by-201 and the size of the right side is 200-by-1

Replace: ts = -prePeak:1/fs:posPeak; by ts = linspace(prePeak, postPeak, 201); But as far as I can see, you use ts only to m...

3 Tage ago | 0

There was an unexpected exception

The error message suggests to read the log file. So please read the log file and post a copy of the important information you fi...

3 Tage ago | 0

Error using eig Input matrix contains NaN or Inf.

The error message is clear: The input of eig() cannot contain NaN or Inf. Without seeing your code, the readers cannot guess, w...

3 Tage ago | 0

Matrix sequence go diagonal

n = 6; % Or if you want: input ('sequence_matrix_'); v = zeros(1, n+1); % Pre-allocation v(2) = 1; % I...

3 Tage ago | 0

Sensitivity Analysis for a ODE

Sensitivity means, that you vary the initial values or parameters by a small value and compare the results of the integration. D...

5 Tage ago | 1

| accepted

dde23 solver gets stuck in an infinite loop (I think?)

dde23 cannot stuck in an infinite loop. But it is easy to provide a system, which has a pole, such that the step size gets tiny ...

6 Tage ago | 0

I have 132 potential positions in a wind farm layout and I have to place 66 turbines on these positions. I want to know how to make combinations to place these 66 turbines.

The notes of dpb and David mean, that the number of possible solutions is too large to be useful, if you want to test all of the...

6 Tage ago | 0

MATLAB crashes when I use any sound commands

The OpenGL flags are for managing the graphics, but your problem concerns the sound. Did you update the sound drivers already?

7 Tage ago | 0

make a subsubfolder in a newly made subfolder

[filepath, name, ext]= fileparts(dcmlist{jj}); % Extract file name mkdir(fullfile(nufolderpath, name, 'edn'));

7 Tage ago | 0

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copy file not working as it should

Use the debugger to find out, what's going on: for kk = 1 :numel(bmplist) if contains(bmplist{kk}, ptt) sourceFile =...

7 Tage ago | 0

Derivative of a function in a particular point

Use one of the quotients of differences to get a numerical approximation of the derivative: x = 1.2345; h = sqrt(eps); dy_r...

7 Tage ago | 0

How to convert a cell array to a compatible matrix?

CC = {rand(9,9), rand(5,4), rand(5,4), rand(6,4), rand(6,4), rand(8,4), rand(8,4), rand(9,4), rand(9, 4); ... rand(4,5), ra...

7 Tage ago | 1

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Dimensions of arrays being concatenated are not consistent.

Use the debugger to check your code: dbstop if error Start your program after typing this in the command window. When Matlab s...

7 Tage ago | 0

insert zero into matrix

You cannot "insert" a 0 in row 170, if the vector has 96 rows only. You can append zeros only: x = rand(96, 1); x(89:170) = 0;...

7 Tage ago | 0

| accepted

Break A While loop using a status Button

Insert a drawnow command inside the loop to let Matlab update the GUI. A small simplification: app.CANMSGStatusLamp.Color = 'B...

8 Tage ago | 1

Question

Are the CC BY-SA 3.0 and BSD-3-clause license compatible?

Code published in the Answers forum is covered by the "Creative Commons Attribution Share Alike 3.0 license", also called "CC BY...

8 Tage ago | 0 answers | 0

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answersspeed up ismember with two-dim data

function Test_Felix X = TestData; Y = TestData; % Original method: tic; mat_overlap = NaN(length(X), length(Y)); for ii ...

9 Tage ago | 0

| accepted

matlab -batch always failed with: | Error: Invalid use of operator.

The string after the -batch argument must contain a Matlab command. "./hello.m" is not a Matlab command, because "./" is the el...

9 Tage ago | 0

| accepted