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...

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...

8 dagar 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...

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 dagar ago | 0

| accepted

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(...

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 dagar 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; ...

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 dagar ago | 0

| accepted

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...

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...

9 dagar 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...

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...

9 dagar ago | 0

| accepted

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(:...

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(:...

9 dagar ago | 1

| accepted

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...

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...

9 dagar 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? ...

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? ...

9 dagar ago | 0

| accepted

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);

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);

9 dagar ago | 0

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Answered

how to rotate a 3d matrix ?

permute(A,[2,1,3]) or pagetranspose(A)

how to rotate a 3d matrix ?

permute(A,[2,1,3]) or pagetranspose(A)

9 dagar 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;

Find min and max value of vector without using built-in function

%maxval = A(1); %minval = 1; maxval = -inf; minval = +inf;

9 dagar 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...

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 dagar 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'); ...

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 dagar ago | 0

| accepted

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...

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 dagar ago | 0

Answered

generate random number from poisson point process with a specific arrival rate

poissrnd

generate random number from poisson point process with a specific arrival rate

poissrnd

11 dagar ago | 0

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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...

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...

13 dagar 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...

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...

13 dagar ago | 0

| accepted

Answered

Class handler to call static methods

h=@(varargin) feval([vehHand '.MakeSound'],varargin{:}); h(arg1, arg2,...,argN)

Class handler to call static methods

h=@(varargin) feval([vehHand '.MakeSound'],varargin{:}); h(arg1, arg2,...,argN)

15 dagar 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...

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 dagar ago | 1

| accepted

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...

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 dagar 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. ...

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 dagar ago | 1

| accepted

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),

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 dagar ago | 0

| accepted

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.

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.

16 dagar 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)

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 dagar 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...

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...

19 dagar ago | 1

| accepted

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{:}

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{:}

19 dagar 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".

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".

19 dagar ago | 1

| accepted