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Jan


Last seen: Today Active since 2009

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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Answered
Convex Hull without the in-built function.
There are many known algorithms, which can inspire you. See https://en.wikipedia.org/wiki/Convex_hull_algorithms

2 días ago | 0

Answered
I have a problem with writing data to file
The folder might be write protected. Check this in general: [fid, msg] = fopen('mn21hmya2021.csv','wt'); assert(fid > 0, msg);...

2 días ago | 0

Answered
SELECTING MATRIX ELEMENTS IN DESCENDING ORDER
This can be obtained by the 2nd output of the sort() command. A=[57 60 62 64 69 67 68 63 36 33; 52 45 25 37 49 55 58 49 39 3...

2 días ago | 0

Answered
How to write this expression in MatLab
x * exp(log(2^x)) = 1

2 días ago | 0

| accepted

Answered
Removing zeros from matrix
What is the wanted output? A = [1 2 3 4 5 6; 1 2 3 4 5 6; 1 2 3 4 5 0; 1 2 3 4 0 0; 1 2 3 0 0 0]; B1 = A; B1(B1 == 0) = NaN...

2 días ago | 0

Answered
How can I get the source code of the function rationalfit()? This function does not contain the code.
Scroll down. On the bottom of the function rationalfit.m you find the call of a core function. Either this core function contain...

2 días ago | 0

| accepted

Answered
Import files from two folders
The error message is clear: Undefined function 'Importing' This means, that this function is not visible. If it was working be...

2 días ago | 0

| accepted

Answered
Generating an average curve from 1,000 replicates of an ODE
I cannot run your code due to a missing function lhdesign, but I guess you want: avg = mean([result{:}(:, 2)], 2);

2 días ago | 0

Answered
Insert two text lines in the blank rows of a txt file
You cannot insert text in files, because a file an grow at its end only. There is no operation to shift the contents of a file. ...

2 días ago | 0

Answered
Remove value question: if previous row -row>+-3, then remove the row in matrix A
Your code contains some problems: for j = 1:size(A) Remember, that size() replies a vector containing the size of all dimensio...

4 días ago | 1

Answered
Please help me to find the errors in my code for predictor corrector method.
I do not know, what you consider as "correct" result. All I see is the running code and there is no chance to predict, what you ...

6 días ago | 0

Answered
What is the fastest way to get bit stream from 1D float data ?
I do not really get, what you try to do. Which format does the audiofile have? What do you call "bit stream"? Instead of explai...

6 días ago | 0

Answered
Need help with error in for loop
Your code tests f1<f2 and f1>f2, but not f1 == f2. In this case x1(i+1) and x2(i+2) are not created. r = (sqrt(5)-1) / 2; d = ...

7 días ago | 0

Answered
Matlab has encountered an internal problem and needs to close
Matlab R2014a is not compatible with Windows 10. See https://www.mathworks.com/support/requirements/previous-releases.html R20...

8 días ago | 0

Answered
created file does not appear?
Are you searching in the correct folder? What does cd tell you? Or do you save the file with an absolute path? Maybe you are ...

8 días ago | 1

| accepted

Answered
how can i solve this ?
"Phimean=51*1" means, that this variable has the sie [51, 1]. After Vp=reshape(Vp,size(Phimean)); Cp has the same size also....

8 días ago | 0

Answered
matching the element of matrix with an array
A = {[2,3;2,7], [3,2;3,4;3,8], [4,3;4,5], [5,4;5,10], [7,2;7,8;7,12]}; B = [17,8,14,4,18] C = cell(size(A)); for iA = 1:numel...

10 días ago | 1

| accepted

Answered
How can i make this code block a function?
A simplified version of your code: function y = my_conv(x, h) z = x(:) .* h; [r, c] = size(z); y = []; for t = 2:r+c ...

10 días ago | 0

Answered
why is this function running infinitely?
% Simplified version: Master1 = eye(22,22); Master1(1, 1) = 0; Master1(22, 22) = 0; scan = 3; temp = Master1; i ...

10 días ago | 0

Answered
where in my code I am thinking wrong?
length() is fragile: It uses to longer dimension. You cannot be sure if your table has more rows than columns. Use height() inst...

10 días ago | 0

Answered
save the output data of GUI
Kp = getappdata(0, 'Kp'); Kr = getappdata(0, 'Kr'); if isfile('myData.mat') % older: exist('myData.mat','file') S = ...

10 días ago | 1

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Answered
use of global variables
I agree with John, Rik and Stephen, and dare to post this as an answer. Can global variables be used in this way? Maybe. The a...

10 días ago | 0

Answered
Is it possible that the "m. file" code is converted from the double precision to the single precision??
This function has been developped an tested since 1995. You cannot be sure, if it works correctly with singles as inputs. conve...

10 días ago | 0

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Answered
Hi, what does ; exactly mean?
Please read the Getting Started chapters of the documentation. This is recommended for beginners also: https://www.mathworks.com...

10 días ago | 1

Answered
for loop return answer in string matrix
Ci = randn(5, 4); pool = ["False", "True"]; a = pool((Ci > 0) + 1)

11 días ago | 0

Answered
Importing .dat file into MATLAB
Searching for more information on the given page I've found: Note: See the PDS JADE SIS Document for more details on the format...

13 días ago | 0

Answered
Random matrix with no repeats in rows and columns.
Create the matrix elementwise. Choose a random element from the available elements. Exclude elements on top and left of the elem...

13 días ago | 1

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Answered
how to use mod function
mod() requires 2 inputs. You provide one only in the callback.

14 días ago | 0

Answered
Why does it give me a problem stating that, Index must not exceed 1?
I guess, that the error occurs here: plot(real(del_ZS1(60)),imag(del_ZS1(60)),'kr') The message means, that del_ZS1 is a scala...

14 días ago | 0

Answered
How to save values from a for loop into a matrix
Do not use "save" as name of a variable. This would shadow an important built-in function, which causes troubles frequently. Yo...

15 días ago | 0

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