Answered
How to do 4-D Equivalent of 3-D surface fitting ?
You can lsqcurvefit if you have Optimization Toolbox. If not, then you might be able to use fminsearch, if you have only a smal...

7 days ago | 0

Answered
How to use a trained neural network as objective function in fminsearch?
fminsearch.is unlikely to be able to handle 12 unknowns well. You should probably use fminunc if you have the Optimization Toolb...

8 days ago | 0

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Answered
How does the mod function compensate for floating point round off?
I suspect it is just meant to tell you that it doesn't do a naive computation like in modNaive below. m=1000*pi; n=pi; mod(...

8 days ago | 1

Answered
Plotting a triangle from 3 3x1 matrices
a = [5; 8; 13]; b = [-5; 7; 21]; c = [12; -32; 0]; V=num2cell([a,b,c,a],2); plot3(V{:},'-o', MarkerFace='r'); xlabel x; ...

8 days ago | 0

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Answered
If I renew my support contract can I download and install in new computer
The support contract is unrelated to the ability to install on additional machines. Most licenses entitle you to activate a Matl...

8 days ago | 0

Answered
Why fsurf show anything for my function?
You should normalize the function, so that the default MeshDensity works well. syms eta__2 zeta__2 Hvs2 =((230584300921369395...

8 days ago | 0

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Answered
How to find mean in theta-direction?
[theta,rho]=cart2pol(x,y); G=discretize(rho,___); %fill in the blank with desired binning specs zMean=splitapply(@mean,z(:...

8 days ago | 1

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Answered
Potential Bug? Freezing while making plots iteratively
Does the freeze always happen right before the saveas? If so, it might be worth issuing a drawnow() command right before the sa...

8 days ago | 1

Answered
Don´t know how to perform IFFT considering my frequency.
But I don´t understand what is the correlation between parameter "n" and my frequency, how do I know how many points to solve? ...

8 days ago | 0

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Answered
How to re-scale a part of 2D matrix?
range=VD>1901&VD<1919; Pe_OPT(range,:) = rescale(Pe_OPT(range,:), 2.778e+07, 3.1005e+07);

8 days ago | 0

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Answered
how to rotate a 3d matrix ?
A=randi(50,5,4,3) rot90(A) %or imrotate(A,90)

8 days ago | 0

Answered
how to rotate a 3d matrix ?
permute(A,[2,1,3]) or pagetranspose(A)

8 days ago | 0

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Answered
Find min and max value of vector without using built-in function
%maxval = A(1); %minval = 1; maxval = -inf; minval = +inf;

8 days ago | 0

Answered
Extreme points of a polyhedral set
If the polyhedron is bounded, you can use lcon2vert, downloadable from, https://www.mathworks.com/matlabcentral/fileexchange/30...

9 days ago | 1

Answered
Is there a way to get rid of white dots in image?
medfilt2 would be appropriate. A=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1129070/image.jpg'); ...

9 days ago | 0

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Answered
detecting circle using hough tranform
I find that imfindcircles is often hard to parameter-tune. Here's an alternative solution using this circle-fitting tool, https...

10 days ago | 0

Answered
how to generate random number between two numbers ?
rand(1,100);

10 days ago | 0

Answered
How to find sx and sy and F intrinsix matrix in camera calibration
You can only find the focal length if you know the pixel sizes at the image plane. There's probably no way you can get it, but I...

12 days ago | 0

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Answered
How to efficiently find and step through similar values in a vector.
Download this, https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vecto...

12 days ago | 0

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Answered
Class handler to call static methods
h=@(varargin) feval([vehHand '.MakeSound'],varargin{:}); h(arg1, arg2,...,argN)

15 days ago | 0

Answered
how can generate an adjacent rectangle ?
You haven't said how the rectangle is being represented as a Matlab variable. If it is a polyshape object , you can use translat...

15 days ago | 1

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Answered
Solve implicit equation for isentropic flow
For example Aratio=4, g=1.4, the true result is M=2.94 We can see below that M=2.94 is not a solution, so either you have atypo...

15 days ago | 0

Answered
App Builder uses class definitions that are not backwards compatible to 2018b. Is there a way to force it to use older class definitions?
GUIDE has an option to generate code. Does AppDesigner have something similar? I hadn't thought so, but apparently, it does. ...

15 days ago | 1

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Answered
How to return value to zero before index of specific element in matrix?
m=4;n=8; Matrix=rand(m,n), V=[3;7;2;5]; Matrix=Matrix.*((1:n)>=V),

15 days ago | 0

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Answered
Problem fitting with lsqcurvefit
Your model has 3 unknowns w(1), w(2), and w(3). However, you are only providing initial guesses x0 for 2 of these variables.

15 days ago | 1

Answered
find the corresponding x and y coordinates
i=100; x=-179:0.02:-175; y=10:0.02:20; [j,k]=ind2sub([numel(x),numel(y)], i); xi=x(j) yi=y(k)

18 days ago | 0

Answered
How do I plot this set as 3d region in matlab?
This will plot the hull for x=y=0; Looks pretty convex (as we knew it must be). x=0;y=0; fcn=@(u,v,z)x.^2+y.^2+u.^2+v.^2-z + 0...

18 days ago | 1

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Answered
Get array of elements based on occurrences of another vector
y=[0;1;2;3;4]; x=[1;1;2;2;2]; z=splitapply(@(x){x},y,x); z{:}

18 days ago | 1

Answered
nargout unavailable in anonymous functions when run from Live Script
Tech Support has classified it as "a bug in MATLAB Live Editor for 'nargout' function".

18 days ago | 1

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