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Jan


12.482 total contributions 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
part of file name
s = ' Hello_World_2020 ' c = strsplit(s, '_') c{2}

3 días ago | 0

Answered
looping though multiple sub-directories
FileList = dir('C:\Base\Folder\**\*.nii'); for k = 1:numel(FileList) File = fullfile(FileList(k).folder, FileList(k).name)...

3 días ago | 0

Answered
How to open my .m files in App Designer?
You do not have to open the files to use a slider for te modification of a constant. You need to write the code as a function, w...

3 días ago | 0

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Answered
array values are overwritten
Prefer file names including leading zeros: image0001.jpg, image 0002.jpg etc. Then the numeical order equals the alphabetical or...

3 días ago | 1

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Answered
Delete table from GUI app variable
Perhaps you mean: delete(app.table)

4 días ago | 0

Answered
How to rename all instances of persistent variables?
Simply remove the persistent command temporarily, rename the variable and insert persistent again. You can open the file e.g. ...

5 días ago | 1

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Answered
How to update variable names after a "clear"
Clearing variables is rarely useful in Matlab, but a waste of time only. So on one hand it is not exactly clear, what you are as...

5 días ago | 0

Answered
Variable is not fully defined on some execution paths.
Does this help? tcell2 = cell(10,10); for t = 1:10 for s = 1:10 tcell2{t,s} = imcrop(pic2, ... [(t-...

5 días ago | 0

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Answered
How to select numbers?
F = rand(1,400); M = rand(1,400); Tf = log(-F) / 0.73; Tm = log(-M) / 1.2; It is hard to guess, what this means: "I should...

5 días ago | 1

Answered
I can´t save
Some virus scanners limit the write access to the user's Documents folder to block encryption trojans. Check the logs of the vir...

5 días ago | 0

Answered
Replace pixels in a matrix without using histeq
for i = 1:1:r %go through rows for j = 1:1:c %columns img_heq(i, j) = T(img(i,j) + 1); end end

5 días ago | 2

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Answered
Error using mex: undefined reference for user build package
According to the documentation https://www.mathworks.com/help/matlab/matlab_external/calling-lapack-and-blas-functions-from-mex-...

5 días ago | 0

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Answered
TITLE: How to dynamically determine the name of the variable to be called in the function
I do not get the point. "excel file with data-series in EXACT order of countries (Y_aa Y_bb, Y_cc., i.e.: aa bb cc.." Whe...

5 días ago | 1

Answered
Removing data from a structure that is less than a certain threshold
The iterative growing and shrinking of arrays is extremely expensive. Better: nTraj = numel(AllTraj.Passive); remove = false(...

6 días ago | 1

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Answered
Accessing data within a structure
The chosen data structure demands for loops. There is no "efficient" solution, which extracts the fields in a vectorized way. Yo...

6 días ago | 0

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Answered
Acessing imrect with another callback
It is a bad idea to set the AppData of the root object. This has the sme disadvantages as global variables. The complete communi...

6 días ago | 0

Answered
why my plot not being displayed?
Try plot(x, y, 'o') to check, if x and/or y are scalars, which plot infinitesimal small dots only.

6 días ago | 0

Answered
Angle between 2 3D straight lines
A = [3,7,9]; B = [4,5,8]; C = [4,5,0]; S1 = B - A; S2 = C - A; Theta = atan2(norm(cross(S1, S2)), dot(S1, S2)); W. Kah...

6 días ago | 1

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Answered
How to store a variable in a vector?
iVec = 0.001:0.001:0.999999; result = zeros(1, numel(iVec)); for k = 1:numel(iVec) i = iVec(k); ... your code r...

7 días ago | 0

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Answered
How to optimize the computing process of a matrix ?
Pre-allocate the output of loops. Example: num = zeros; for nn=1:length(Y) NUM = size(Y{1,nn}); num(nn...

7 días ago | 2

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Answered
Trying to run a script many times and combine all the results
eList = cell(1, 100); for k = 1:100 callYourScript; eList{k} = e; end A cell array is useful, if the elements, here...

7 días ago | 0

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Answered
monte carlo simulation in matlab two dices roll
n = 10; % Number or trials throw = randi(6, n, 2); % Value of throws, 2 dice SumThrow = sum(throw, 2...

7 días ago | 0

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Answered
Euclidean distance of two vectors
Do you know the definition of the Euclidean distance? G = rand(1, 72); G2 = rand(1, 72); D = sqrt(sum((G - G2) .^ 2)); A m...

7 días ago | 32

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Answered
Matlab 2015a unable to find C++ compiler in windows10 even after installing microsoft professional C++ 2012. Can anyone help? I initially tried installing SDK7.1 but i was gettting .net framework4 installation errors.
https://www.mathworks.com/matlabcentral/answers/233850-how-can-i-install-sdk-7-1-on-windows-10 https://www.mathworks.com/matlab...

11 días ago | 0

Answered
Hi guys. I need help splitting a number into its individual parts and then add them. E.g. the number would be 1994 = 1 + 9 + 9 + 4 = 23
N = 1994; m = floor(log10(N)); D = mod(floor(N ./ 10 .^ (m:-1:0)), 10); >> D = [1, 9, 9, 4]

11 días ago | 0

Answered
P files cannot be analyzed to find their dependencies. Please add P file dependencies manually
I'd start with a web search: Ask your favorite search engine for "Matlab get dependencies of P file". You will find e.g.: https...

11 días ago | 2

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Answered
Stepping Through Text Documents
See https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files A more specific answer is p...

13 días ago | 0

Answered
Output argument "px" (and maybe others) not assigned during call to "function1"
If the initial value of varx is smaller than tol already, the body of the while varx>=tol loop is not entered at all. Then e.g. ...

13 días ago | 0

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Answered
where is the the porblem in audiowrite?
In the original question you write: AUDIOWRITE('test.wav',s,srate) In the comment you mention: audiowrite('test.wav',s,t) Th...

13 días ago | 0

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