回答済み
Compiled mex file raises memory issue
Avoid using int as dimensions. Call mxCreateNumericArray as explained in the documentation: mxArray *mxCreateNumericArray(mwSiz...

3年以上前 | 1

回答済み
How to prevent triggering 'SizeChangedFcn' callback too many times?
See this solution: https://www.mathworks.com/matlabcentral/answers/570829-slow-sizechangedfcn-or-resizefcn#answer_475105

3年以上前 | 1

回答済み
Analyzing different sections of an array
Either reshape the array: x = rand(20, 100); y = reshape(x, 20, 10, 10); m = mean(x, 2); % If you want the mean value over b...

3年以上前 | 0

| 採用済み

回答済み
How to perform svd without using the inbuilt function?
You can find working solutions in the FileExchange: https://www.mathworks.com/matlabcentral/fileexchange/12674-simple-svd htt...

3年以上前 | 0

回答済み
How do I take audio from Youtube and play it on Matlab?
As far as I know you cannot extract the sound directly in Matlab. Use an external tool like youtube-dl .

3年以上前 | 0

回答済み
uninstalling old version error
If the installation is corrupted, the uninstallation can fail. Then install this version again overwriting the existing installa...

3年以上前 | 0

回答済み
Subtracting a value in a 3D array with all values in another 3D array
A = rand(5,6,7); B = rand(6,7,8); D = min(A(:).' - B(:), [], 1); Result = reshape(D, size(A)); If the intermediate matrix A(...

3年以上前 | 1

| 採用済み

回答済み
How to determine how many random numbers were generated, using Mersenne twister?
The direct solution is to modify the function joeblow1 and joeblow1 such, that they count the created random numbers. Another o...

3年以上前 | 0

回答済み
how i can fix the problem of isPrimitiveRoot ?
Open the documentation: doc isprimitiveroot or online: https://www.mathworks.com/help/symbolic/isprimitiveroot.html Scroll d...

3年以上前 | 0

| 採用済み

回答済み
How to extract data from this chunk of data
c = '77es-78es-79es-79es-80es-81es-82es-83es-144es-145es-146es-147es-1'; m = strfind(c, 'es'); d = c(m(1):m(end)-1); d = st...

3年以上前 | 1

回答済み
Unrecognized function or variable 'lof'.
Do you have the Statistics and Machine Learning Toolbox installed and licensed? If not, you cannot access functions of this tool...

3年以上前 | 0

回答済み
How to make a while loop to repeat multiple times with different values of variable?
Simply add a loop to modify q: for q = 0.5:4 t_in_before=19; t_out=-1; time = 0; while t_in_before > 5 ...

3年以上前 | 0

| 採用済み

回答済み
Unable to perform assignment because the size of the left side is 1-by-3 and the size of the right side is 7-by-3.
"Unable to perform assignment because the size of the left side is 1-by-3 and the size of the right side is 7-by-3." This error...

3年以上前 | 0

回答済み
Can anyone identify the error? and correct it.
Avoid an overkill of parentheses: Ip=(I0)+((p*I01)+(p*(P-1)I02)/(2))+((P(p-1)(p-2)*I03)/(6))+((p(p-1)(p-2)(p-3)*I04)/(24)) % ...

3年以上前 | 0

回答済み
Eliminate a for loop to increase speed
N = 2; L = 2; T = 1; a = [1 1i; -1i -1]; nplq = int8(de2bi((0:2^(N*L)-1),'left-msb')); % [0 0 0 0; 0 0 0 1; 0 0 1 0;...

3年以上前 | 0

| 採用済み

質問

List of all functions an their toolboxes
Is there a way to get a list of the names of all toolbox functions? If I publish a toolbox, I want to avoid conflicts with Matl...

3年以上前 | 1 件の回答 | 0

1

回答

回答済み
GUI handle empty after using some scripts
Running a pile of scripts impedes the debugging massively, as you can see. Any of the scripts can be responsible for overwriting...

3年以上前 | 0

| 採用済み

回答済み
How to enable multi-core CPU processing during MATLAB code running?
It depends on the code. Many functions are multithreaded and use more cores for large inputs. This applies e.g. to sum(), filter...

3年以上前 | 0

回答済み
Why this gives error?
This is the failing function: function [x,fval,gfx,output] = main(varargin) [x,fval,gfx,output] = hPSO1(@main3, 4, options, ...

3年以上前 | 0

回答済み
Quaternions Computation Time too long
While the multiplication with the rotation matrix calls an optimzed BLAS library directly, rotatepoint is a function, which call...

3年以上前 | 0

回答済み
Create a binary image from a 2-dimensional binary [0 1] matrix
What have you tried? M = false(100, 100); M(26:50, 76:100) = true; % The black rectangle Instead of setting all pixels to bl...

3年以上前 | 1

回答済み
I wanna make a .mat file
In Matlab this is easy: data = magic(4); % Arbitrary test data save('file.mat', 'data')

3年以上前 | 0

回答済み
Monospaced Font seems different in different Matlab versions...
The font, which is used by the generiv name "monospaced", changes between Matlab versions. I do not know, why MathWorks decided ...

3年以上前 | 1

| 採用済み

回答済み
Unable to perform assignment because the left and right sides have a different number of elements.
"But LFP1_t ed LFP2_t are both two vectors of 1000x1." - yes, of course, but the left side of the assignment correlation(t) is a...

3年以上前 | 0

回答済み
How to copy 30K images from folder to another according to the names in train and test text listes
With some guessing: source = 'D:\Dataset\NUSWIDE-Obj\imagesnus30k'; dest = 'D:\Dataset\NUSWIDE-Obj\Images30K'; tr = textr...

3年以上前 | 0

| 採用済み

回答済み
Working with large numbers of vectors
Of course: If all vectors have the same size, concatenate them to a matrix. How are the 5000 vectors stored currently?

3年以上前 | 0

| 採用済み

回答済み
Accessing each matrix in a cell array of size ~8GB and filter it
A loop is the efficient solution. Simply try it. If you have >= 16 GB of RAM, this array should be processed without problems. ...

3年以上前 | 0

| 採用済み

回答済み
the convolution function i wrote doesn't work for the big arrays
Pre-allocation is important, if you work with large arrays. Example: x = []; for k = 1:1e6 x(k) = k; end In each iterat...

3年以上前 | 0

回答済み
Matlab GUI elements disappear on newer version of Matlab
The uibuttongroup hides objects, which have been created before in modern Matlab versions. Set a position of the uibuttongroup'...

3年以上前 | 0

| 採用済み

回答済み
Identify lines that have a repetition (unique function)
data = [ 2.3300000e+02 3.5300000e+02 1.4912281e+00 2.3300000e+02 3.5200000e+02 1.4912281e+00 3.5300000e+0...

3年以上前 | 0