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Jan


Last seen: 1 día ago
12.572 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
What font do you code in?
Andale Mono and Bitstream Vera Sans Mono.

1 día ago | 1

Answered
Why Matlab does not read the input value?
This piece of code is called repeatedly. This shown code seems to be fine, so the behavior is caused the code, which calls this ...

1 día ago | 0

Answered
uiopen vs audioread, is there an advantage to one over the other for .wav files?
The function uiopen and audioread have two different jobs. While the first opens Matlab files with the apropriate application, t...

10 días ago | 0

Answered
Can't run an external program with arguments
Under Windows the folders in the PATH a separated by semicolons, not colons. Do you mean: cmdStr3 = 'set path=%path%C:\Program ...

10 días ago | 0

Answered
Slow SizeChangedFcn or ResizeFcn
The first version was not sufficient in all cases. In addition it is required to prevent a repeated entering of the code: funct...

11 días ago | 0

Answered
Slow SizeChangedFcn or ResizeFcn
One solution is to ignore the built-in resize methods and use a specific WindowsButtonDownFcn to emulate a resizing. But reinven...

17 días ago | 0

Answered
Is it possible to programmatically check whether MATLAB has been started with the "-nodisplay" option?
See also: https://www.mathworks.com/matlabcentral/answers/407059-if-matlab-desktop-elseif-matlab-nodesktop : usejava('desktop')...

17 días ago | 1

Question


Slow SizeChangedFcn or ResizeFcn
When a SizeChangedFcn or ResizeFcn takes some time, the figure size can be changed, until the display is updated. Example: func...

20 días ago | 2 answers | 0

2

answers

Answered
Vector between vectors in intervals
Remark: The inputs vectors are not normalized and only almost orthogonal: format long g v1 = [-0.0345; 0.9984; -0.0447] v2 ...

8 meses ago | 0

Answered
Can anyone help me with the "Axis rotation sequence for the Euler angles"
The rotation matrix for the Euler angles in the order XYX is: s1 = sin(alpha); c1 = cos(alpha); s2 = sin(beta); c2 = cos(bet...

9 meses ago | 1

Answered
Matlab has encountered an internal problem and needs to close.
The message teels you: If this problem is reproducible, please submit a Service Request via: http://www.mathworks.com/...

9 meses ago | 0

Answered
Use the time step within ode15s
If the function to be integrated requires the time steps of the solver, something went wrong. I'm convinced that this is a logic...

9 meses ago | 0

| accepted

Answered
Keep getting error message on my ODE function
u0 = [P0, zeros(1, N + 1)];

9 meses ago | 0

| accepted

Answered
Eulers method for system of linear equations
h = 0,1; % ^ you mean 0.1 with a dot There is no need to create the accleration as array. Reply a scalar instead: funct...

9 meses ago | 0

Answered
Skipping files in a set
What does "files 132, 290, and 404" mean? Are these the indices in rightfiles, or are these parts of the file name? rightfiles=...

9 meses ago | 0

Answered
How to sum over indices?
If you assume, that something is wrong, mention, what you observe. This is better than letting the readers guess, what the probl...

9 meses ago | 1

| accepted

Answered
How can I convert a binary fraction to decimal?
'11001' means: 1*2^0 + 0*2^1 + 0*2^2 + 1*2^3 + 1*2^4 or: [1,1,0,0,1] * 2 .^ (4:-1:0).' (this is what happens inside bin2dec - ...

9 meses ago | 3

| accepted

Answered
How do I install MinGW for old Matlab R2007?
Matlab R2007 is not supported under Windows 7. MinGW is not supported for Matlab R2007. In consequence the combination of a mode...

9 meses ago | 0

Answered
How do you form a while function using a function file and then using the function file to form a sequence by performing this operation?
Change n directly and collect the output in the vector v by inserting it at the index end+1: function v = collatz(n) v = n; w...

9 meses ago | 0

| accepted

Answered
Using parfor in a sparse setting
The help page "Troubleshoot Variables in parfor-Loops" explains the problem: A = [1;2;3;4;nan;nan;nan;nan;nan;10;11]; B = na...

9 meses ago | 0

| accepted

Answered
Speed up nested loops
This line is expensive: normal_vector = ((cross(P_all(k-t,:),P_all(k,:)) / ... (norm(cross(P_all(k-t,:),P_all(k,:)))))); ...

9 meses ago | 1

| accepted

Answered
Table of Matlab release features
%{ Version Release Notes 1 1984 2 1986 3 1987 3.5 1...

9 meses ago | 3

Question


Table of Matlab release features
After reading Rik's comment I looked for a list of Matlab releases and their corresponding features. Wiki: Matlab contains an ex...

9 meses ago | 2 answers | 3

2

answers

Answered
Does Matlab perform well on AMD Ryzen?
It depends if the used libraries call FMA3 commands. If so, the Ryzen crashes very fast. The performance will depend on your pr...

9 meses ago | 0

Answered
Why is my code showing an error? Why is the line deleted?
The shown code does not reproduce the problem. We cannot guess reliably, why one of the obejcts in h is deleted. But a weak gues...

9 meses ago | 0

Answered
variable size matrix and converting letters to numbers
"user enter a variable size matrix": It depends on how you want to implement this: by a GUI, as Matlab code, as text file, in Ex...

9 meses ago | 0

| accepted

Answered
Help on understanding the following matlab code ?
Step by step: flipud(xt): This flipps the order of elements vertically. Try it: x = rand(3,2) flipud(x) min(Y, [ ], 2) : fin...

9 meses ago | 0

| accepted

Answered
Resuming from "keyboard" command?
Using debug commands for an interaction with the user is a really bad design. A dynamic modification of the workspace is very fr...

9 meses ago | 0

Answered
Memory usage very high
How do you observe the memory consumption? The Taskmanager displays the memory reserved for Matlab. If Matlab allocates memory a...

9 meses ago | 0

Answered
Return vectors from for loop as columns in matrix
Start with cleaning up the code. The lines Dplus; and Dminus; do nothing, so they are wasting time only and confuse the readers...

9 meses ago | 1

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