Beantwortet
Problem understanding this "for" loop
Before the loop xx is pre-allocated to the maximum number of iterations. The for loop runs from 1 until MAXITER. The variable o...

mehr als 3 Jahre vor | 1

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How to to add column 3rd+4th, 6th+7th and 9th+10th from a 8x12 matrix?
C1 = B(:, 3) + B(:, 4); C2 = B(:, 6) + B(:, 7); C3 = B(:, 9) + B(:, 10); Or maybe: C = B(:, [3,6,9]) + B(:, [4,7,10])

mehr als 3 Jahre vor | 0

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How to filter out files with a list of specific string in UIGETFILE command?
As far as I can see, the file pattern [x] is not implemented in uigetfile: xlsfile = uigetfile('EF[AI]*.xls', 'Select Excel fil...

mehr als 3 Jahre vor | 0

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Hold on and Hold off command keeps all plots on subsequent graphs
clear clears the variuables of the workspace. clc clears the command window. Both do not have any connection to the state of the...

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 1

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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

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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Beantwortet
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...

mehr als 3 Jahre vor | 0

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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 .

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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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(...

mehr als 3 Jahre vor | 1

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Beantwortet
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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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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 ...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

Beantwortet
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)) % ...

mehr als 3 Jahre vor | 0

Beantwortet
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;...

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Frage

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...

mehr als 3 Jahre vor | 1 Antwort | 0

1

Antwort

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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...

mehr als 3 Jahre vor | 0

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Beantwortet
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...

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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

mehr als 3 Jahre vor | 0

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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 ...

mehr als 3 Jahre vor | 1

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Beantwortet
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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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Beantwortet
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?

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