Bruno Luong
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Content Feed
Finding face vertices of a polygon
If you have R2021a or later, there is a new method allcycles that can achieve the goal N = [... 5 12 5 11 6 8 ...
8 days ago | 0
| accepted
How to return a uint64_t from a mex function?
https://www.mathworks.com/help/matlab/apiref/mxcreatenumericmatrix.html mxArray *A; A = mxCreateNumericMatrix(1, 1, mxUINT64_C...
11 days ago | 1
| accepted
How exactly does MATLAB calculate a sum of array elements by its sum() function? Does it use any compensated summation algorithm such as Kahan?
According to my test it seems MATLAB does not sum by chunk when operating on vector, to ensure the result is consistent, i.e. no...
24 days ago | 0
why evalin doesnt wotk in App Designer matlab 2017b?
You probably forget to populate APP_isc_n_gbxInp in the base workspace. I create a small app (attached) and evalin works just f...
1 month ago | 0
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Error using mex No supported compiler was found.
These threads might be useful for you https://www.mathworks.com/matlabcentral/answers/864430-compiler-support-for-intel-oneapi-...
1 month ago | 0
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Has QR [Q,R,E]=qr(X,0) changed? licols for extracting lin indep cols is not working
It seems working fine on random matrix (R2021b online server or my PC) X=randn(1000); [q,r,e] = qr(X,0); issorted(abs(diag(r)...
1 month ago | 0
How can I perform large sparse matrix multiplication efficiently when one sparse matrix is block diagonal?
You might rethink of the storage of your data, such as this (tic/toc result obtained from run on TMW online server): I=1e4; J=...
1 month ago | 1
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What is missing from MATLAB #2 - the next decade edition
Probably it breaks compatibility, but it would make functions/operators svd, *, ', .' dealing with n-d arrays similar to pagesvd...
1 month ago | 1
Run two scripts simultaneously matlab
Somewhat possible with parfeval But I would agree with Jan, runing two Matlab sessions is perhaps easiest.
1 month ago | 1
c++ programming.
In C++ the main function signature should be int main() The void argument is for C (not C++). Your code has illegal comma ","...
1 month ago | 1
Unexpected, unexplained, difference between Matrix linear index and row and column subscripts
Try to change for i=size(P,1)*size(P,2) to for i=1:size(P,1)*size(P,2) You light also learn to use debugger so such task.
1 month ago | 1
| accepted
How to compute cholesky to all slice of a tensor?
For real semi definite matrices, you can take a look at https://www.mathworks.com/matlabcentral/fileexchange/37515-mmx Unfortun...
1 month ago | 0
| accepted
how to find the nearest value?
A=[ 1 2 3 4 5 6] B=[6.1 5.1 4.1 3.1 2.1 1.1] position_A=[10 20 30 40 50 60] loc = interp1(A,1:length(A),B,'nearest'...
1 month ago | 0
| accepted
I have matrix A and I need to find (e^(At)) where t is the sampling time. How to find that? Also what is the difference between exp(A) and expm(A)?
Math notation e^(At) is computed in MATLAB with expm(A*t) or equivalently expm(A)^t
1 month ago | 0
When the error comes, how to return a flag but not stop the process
You might learn about try / catch
1 month ago | 0
| accepted
Generate all possible combinations summing up to a given number
You can use this file exchange https://www.mathworks.com/matlabcentral/fileexchange/17818-all-permutations-of-integers-with-sum...
1 month ago | 0
Speed up comparing two arrays and write into new array
For simplification I use numerical data for Colors_Res/Assoc_Colors adatp tou your data type clear % Dummy test data coordInd...
1 month ago | 0
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How to strrep only certain strings
x = {'e-.00085';'8.5e-4'} regexprep(x, '^e', '')
2 months ago | 0
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MatlabR2019b standalone sharing
You need to have MATLAB compiler and they need to install the MCR.
2 months ago | 0
how to kill a process from Matlab
I don't know if it is matter but I always use PID to kill a process, not directly the image name. Here is my code function Kill...
2 months ago | 0
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Determine Camber and Thickness of a Airfoil - Given the xy coordinates
If you can tolerate some finite precision, you migh discretize the interior as b&w image, look for the skeleton https://www.mat...
2 months ago | 0
Problem in using scatteredInterpolant
Use nearest method F = scatteredInterpolant(..., 'nearest')
2 months ago | 0
| accepted
package matlab app without reveling source code
"Is there a way to package and install a MATLAB app in a way that the contents are not exposed?" In R2021b the compiler (MCC) i...
2 months ago | 1
How to get the smallest value in submatrices
B=randi(9,10,2) [m,n] = size(B); k = 5; if mod(m,k) error('m must divisible by k'); end minsub = min(reshape(B,[m/k ...
2 months ago | 0
| accepted
extract roll pitch yaw rotation angles from 3D transform
See if you can find the formula your are looking for https://www.geometrictools.com/Documentation/EulerAngles.pdf
2 months ago | 0
R2021b: The Run Section tool in the Editor has been removed
It's still there
2 months ago | 0
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is it possible to know if an alert dialog box has opened in app designer app?(testing purposes)
Check out function ishandle
2 months ago | 0
| accepted
Question
Restriction of functions run under parfeval
I just see parfeval is available for R2021b allowing to run parallel function (in background) even without the parallel toolbox,...
2 months ago | 1 answer | 1
