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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
Is there a reason why row vectors are default in Matlab?
Matlab was developped as "Matrix Laboratory". So the default type is a double matrix. If the focus has been set to vectors, it w...

3 hours ago | 0

Answered
Translate file name in mapped drive to unc path filename
No, there is no Matlab command to perform this automatically. net use sovles this and WMIC can help also: [status, out] = syst...

6 hours ago | 0

Answered
How to efficiently allocate memory using a parfor loop
ET = permute(E_mat, [2,3,1]); Q = zeros(size(ET)); parfor n = 1:size(E_mat, 3) Q(:,:,n) = sigmaE(n) / 2 / mass_density(n...

6 hours ago | 0

Answered
exportgraphics does not save at specific location
The folder is existing but Matlab cannot create a file in it. Then Matlab does not have write permissions in this folder. filea...

6 hours ago | 0

Answered
merge many mat files in one big vector
Why do you overwrite the first part of PSD_Monat in each iteration? for k=1 PSD_Monat([1:k*f1],1)=d(:,1) %d([1:k*f1],1)...

1 day ago | 0

Answered
Is it possible to run Matlab Deep Learning Toolbox functions in Octave?
No. For 2 reasons: It is not 100% compatible (I'm sure!). The license conditions will not allow this. If you do have a license...

1 day ago | 0

Answered
Min of each column of a sparse matrix?
For large inputs a loop is faster than accumarray: X = sprand(2000, 20000, 0.2); tic; for k = 1:10 [ii,jj] = find(X); ...

1 day ago | 0

Answered
simplify my script?
Move all repeated work out of the loops. In your case: % Load data ncfile = 'Temperature.nc'; months = {'January'...

1 day ago | 0

Answered
generate sine waves that appears after one another
figure; % Insert this: axes('NextPlot', 'add'); % Equivalent to: hold('on') ... Otherwise the plot() command clears it...

1 day ago | 0

Answered
Function not processing dat for each element in array
Remember, that Matlab's IF condition must be a scalar. If you provide n as a vector, the line: if n >= 50 implicitly perfo...

2 days ago | 1

Answered
Is there any equivalent keyword 'goto' in matlab not in simulink but in matlab coding
No, there is no GOTO in Matlab and it should be avoided strictly in good code. Maybe: function YourFunc n = 123; % ??? for ...

2 days ago | 0

Answered
Storing output of function file in workspace
Nested nested functions - brrr. What about: t = 0.3:0.1:6; ? You store the variable Cfit in the workspace of the function Pa...

2 days ago | 0

Answered
Readmatrix in struct using parfor
Fields names cannot contain the charcater '#' . fld = sprintf('File_%d', i); Data.(fld) = readmatrix(Files2Read{i}); ...

2 days ago | 0

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Answered
Need some help with re-formating a text.file using MATLAB?
Actually all you want to do is to replace the string a = sprintf('''10''\n') % by b = sprintf('''10'' good ') and c = sp...

5 days ago | 0

Answered
how to make timer callback function?
app.something = 'hello'; tt = timer('Name','Test','Period',1, ... 'ExecutionMode','fixedSpacing','BusyMode','drop'); tt.Ti...

5 days ago | 0

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Answered
Load MatLab with Network License when Network is Unavailable
A network license is designed to work inside the specified network only. This is its nature. So you are asking for a break of th...

5 days ago | 0

Answered
is it possible to use "for loop" for matrix?
X1 = zeros(1,6); X2 = zeros(1,6); for k=1:6 for j=1:n X1(1,k)=(j^k)+X1(1,k); X2(1,k)=(j^k)+X2(1,k); ...

5 days ago | 1

| accepted

Answered
How to make 3 arrays (Test , Test2, Test3) that are of different lengths into one matrix?
A matrix is a rectangular list of elments. This means, that all rows must have the same number of elements. Either fill the sho...

5 days ago | 1

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Answered
how to use multiple 'for loop' for one function?
Please post the complete error message, if you mention an error. This message contains the information, in which line the proble...

5 days ago | 0

| accepted

Answered
Iterating inside an iteration loop, while loop
This is not a bug, but useful for efficient code: 10^(-4) is an expensive power operation while 1e-4 is a cheap constant. if Z...

5 days ago | 0

Answered
Compatibility of code when updating Matlab licence
See: https://www.mathworks.com/support/requirements/matlab-system-requirements.html R2021b supports Windows 7 SP1, while Win7 i...

5 days ago | 1

Answered
Vectorize comparing a column vector in a matrix to all other vectors in the matrix.
Why do you want to vectorize this code? I assume, this will cause a slow down, because this creates large temporary array, which...

6 days ago | 0

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Answered
Share global variables between windows App Designer
Global variables are a mess in every case. Sending the data through a well defined interface would be much better. Do not use "...

6 days ago | 0

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Answered
Image resize without losing quality of image ? (urgent Issue)
Of course reducing the number of pixels reduces the resolution. But you can reduce the artifcats: imresize(Img, [640,427], 'lan...

7 days ago | 0

Answered
how to delete all row contain a 1's and how to delete a column contain 1's. Q=[3 1 1 0 0 1;1 3 1 0 1 0;1 1 3 1 0 0;0 0 1 3 1 1;0 1 0 1 3 1;1 0 0 1 1 3]
Following your instructions: "Actually firstly i want to deleted the all columns that contain a 1's in first row. Then we check ...

7 days ago | 0

| accepted

Answered
Can I define my own special characters?
No, you cannot treat special characters in Matlab as functions. Of course, you can create a pre-processor, which replaces such ...

7 days ago | 1

| accepted

Answered
Is it possible to group some strings of code, in order to shorten the visualization of the script?
You do not mean "strings". Strings are characters enclosed in double quotes. With "open and close groups" you mean the folding c...

7 days ago | 1

| accepted

Answered
Make Variable Names in a table numbers
Header are strings, not numbers. You cannot use numbers to be a header. allData = reshape(1:64, 8, 8) t = array2table(allData)...

7 days ago | 0

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Answered
mat1(mat2) = mat1 assignment
The pattern is trivial. I do not understand, what is unclear: t1 = [ 0 1 2 3 4 5 6 ]; t2 = [ 7 6 5 4 3 1 1 ]; t1(t2) = t1; ...

7 days ago | 1

| accepted

Answered
Why doesn't Matlab recognize my data format?
a = datetime('28/02/2018', 'InputFormat', 'dd/MM/uuuu') b = datetime('29/02/2018', 'InputFormat', 'dd/MM/uuuu') % FAILS: % Un...

7 days ago | 0

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