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? ...

7 days 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);

7 days ago | 0

| accepted

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)

7 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;

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

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

7 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...

Extreme points of a polyhedral set

If the polyhedron is bounded, you can use lcon2vert, downloadable from, https://www.mathworks.com/matlabcentral/fileexchange/30...

7 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'); ...

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'); ...

7 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...

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...

8 days 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

9 days 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...

11 days ago | 0

| accepted

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...

11 days ago | 0

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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)

13 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...

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...

13 days 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...

13 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. ...

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. ...

13 days 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),

13 days 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.

14 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)

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)

16 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...

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...

17 days 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{:}

17 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".

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".

17 days ago | 1

| accepted

Question

nargout unavailable in anonymous functions when run from Live Script

The following code works fine at the command line and in mfile scripts. >>f=@()nargout >> f() ans = 0 >> a=f()...

17 days ago | 1 answer | 2

Answered

Calculate the largest, smallest diameter and the centroid of a polyshape (irregula rpolygon) from a set of points

For the centroid, polyshape has a method centroid. If the min and max feret diameters are what you want, then one approach wou...

Calculate the largest, smallest diameter and the centroid of a polyshape (irregula rpolygon) from a set of points

For the centroid, polyshape has a method centroid. If the min and max feret diameters are what you want, then one approach wou...

18 days ago | 0

| accepted

Answered

How to evenly distribute number of points in a non linear line made itself by number of points with different distances

See interparc: https://www.mathworks.com/matlabcentral/fileexchange/34874-interparc

How to evenly distribute number of points in a non linear line made itself by number of points with different distances

See interparc: https://www.mathworks.com/matlabcentral/fileexchange/34874-interparc

18 days ago | 1

Answered

Mulitpling a scalar to specfic numbers in a vector

One way: [1 3 5 10 15 17 20 25 30].*repelem([2,5,10],3)

Mulitpling a scalar to specfic numbers in a vector

One way: [1 3 5 10 15 17 20 25 30].*repelem([2,5,10],3)

18 days ago | 1

| accepted

Answered

Newton iteration doesn't run smoothly

Possibly, you meant to have, if (abs(x-x0)) <= eps

Newton iteration doesn't run smoothly

Possibly, you meant to have, if (abs(x-x0)) <= eps

19 days ago | 0

Answered

Nonlinear constraints not respected in optimization

Nonlinear constraints are only satisfied at convergence, and then only within the tolerance settings that you've specified. Yo...

Nonlinear constraints not respected in optimization

Nonlinear constraints are only satisfied at convergence, and then only within the tolerance settings that you've specified. Yo...

19 days ago | 0

Answered

3d Matrix - Extract Subarray and Multiply by Conjugate Transpose without Forloops

[m,n,p]=size(A); Ar=reshape(A,[],p).'; UU = reshape(Ar,p,1,[]).*conj(reshape(Ar,1,p,[])); UU=reshape(UU,p,p,m,n); %obta...

3d Matrix - Extract Subarray and Multiply by Conjugate Transpose without Forloops

[m,n,p]=size(A); Ar=reshape(A,[],p).'; UU = reshape(Ar,p,1,[]).*conj(reshape(Ar,1,p,[])); UU=reshape(UU,p,p,m,n); %obta...

19 days ago | 1

| accepted

Answered

What is the best and quick way to find the intersections points set of two 3d surfaces?

You can to download this FEX submission, https://www.mathworks.com/matlabcentral/fileexchange/74010-getcontourlinecoordinates?s...

What is the best and quick way to find the intersections points set of two 3d surfaces?

You can to download this FEX submission, https://www.mathworks.com/matlabcentral/fileexchange/74010-getcontourlinecoordinates?s...

19 days ago | 0

| accepted