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Professional Interests: Mathematical Computing

Answered

Find the intersecting points

If you have the image in hand. Get the locations/ positions i.e (x,y) for both the regions using logical indexing. Get the b...

Find the intersecting points

If you have the image in hand. Get the locations/ positions i.e (x,y) for both the regions using logical indexing. Get the b...

16 hours ago | 0

Answered

Plot non-continuous lines with markers

x = [1 2 3 4]; y = [2 3 2 1]; figure; plot(x, y, '-bo', 'LineWidth', 3, 'MarkerSize', 20, 'MarkerFaceColor', 'w', 'MarkerEdge...

Plot non-continuous lines with markers

x = [1 2 3 4]; y = [2 3 2 1]; figure; plot(x, y, '-bo', 'LineWidth', 3, 'MarkerSize', 20, 'MarkerFaceColor', 'w', 'MarkerEdge...

20 hours ago | 3

| accepted

Answered

How do I receive the touching points of a circle with given radius inside a curve?

Use this: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function Also y...

How do I receive the touching points of a circle with given radius inside a curve?

Use this: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function Also y...

3 days ago | 0

Answered

define x and y for interpolation of scattered data

Let A be the matrix, which is of size m*n x = 1:n ; y = 1:m ; [X,Y] = meshgrid(x,y) ; xq = 1:0.5:n ; yq = 1:0.5:m ; ...

define x and y for interpolation of scattered data

Let A be the matrix, which is of size m*n x = 1:n ; y = 1:m ; [X,Y] = meshgrid(x,y) ; xq = 1:0.5:n ; yq = 1:0.5:m ; ...

3 days ago | 0

Answered

How can I save data in a multidimensional array

As you have Table T in your hand. You have what you want in hand already. You can access your required array suing. T.Vego ...

How can I save data in a multidimensional array

As you have Table T in your hand. You have what you want in hand already. You can access your required array suing. T.Vego ...

3 days ago | 0

Answered

using a vector to represent three coefficients.

function [quadRoots,disc] = Q1_19000046(coeff) %[quadRoots,disc] = Q1_19000046(coeff); %Compute quadRoots and disc of quadrati...

using a vector to represent three coefficients.

function [quadRoots,disc] = Q1_19000046(coeff) %[quadRoots,disc] = Q1_19000046(coeff); %Compute quadRoots and disc of quadrati...

3 days ago | 0

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Answered

Getting the max value of a certain column, fetching the entire row from a 3D matrix and write those in a new matrix

A = rand(68,8,30) ; % randmom data for demo col = 3 ; % third column from which max to be seeked [m,n,p] =size(A) ; ...

Getting the max value of a certain column, fetching the entire row from a 3D matrix and write those in a new matrix

A = rand(68,8,30) ; % randmom data for demo col = 3 ; % third column from which max to be seeked [m,n,p] =size(A) ; ...

3 days ago | 0

Answered

How to smooth out a surf plot

surf(z_vec, v2in_vec, all_v2.') Increase the dimensions of z_vec and v2in_vec. Make the difference/ step size small to increase...

How to smooth out a surf plot

surf(z_vec, v2in_vec, all_v2.') Increase the dimensions of z_vec and v2in_vec. Make the difference/ step size small to increase...

3 days ago | 0

Answered

Classification learner app input issue

Two options: Merge all the csv files into single csv file and load the data through csv file. Load each file data into works...

Classification learner app input issue

Two options: Merge all the csv files into single csv file and load the data through csv file. Load each file data into works...

3 days ago | 0

Answered

How to make visualization of multi-vehicle motion?

Use interpolation and get all the vehicles to the same time vector. Read about interp1. When you do this, your position of each ...

How to make visualization of multi-vehicle motion?

Use interpolation and get all the vehicles to the same time vector. Read about interp1. When you do this, your position of each ...

6 days ago | 0

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Answered

How to sum columns of a matrix in MATLAB in specified number of columns?

A = rand(2500,500) ; B = reshape(A,2500,10,[]) ; iwant = squeeze(B,2) ;

How to sum columns of a matrix in MATLAB in specified number of columns?

A = rand(2500,500) ; B = reshape(A,2500,10,[]) ; iwant = squeeze(B,2) ;

6 days ago | 0

Answered

How to make every element in the form of isoparametric, Lagrangian quadratic element?

nodes = [nodes(:,1) nodes(:,5) nodes(:,2) nodes(:,6) nodes(:,3) nodes(:,7) nodes(:,4) nodes(:,8) nodes(:,9)] ;

How to make every element in the form of isoparametric, Lagrangian quadratic element?

nodes = [nodes(:,1) nodes(:,5) nodes(:,2) nodes(:,6) nodes(:,3) nodes(:,7) nodes(:,4) nodes(:,8) nodes(:,9)] ;

6 days ago | 0

Answered

Obtaining the pixel values within an ROI

As you have the coordinates for the boundary, use inpolygon and get the locations of the points lying inside the clsoed region.....

Obtaining the pixel values within an ROI

As you have the coordinates for the boundary, use inpolygon and get the locations of the points lying inside the clsoed region.....

6 days ago | 0

Answered

contour plot for 3d data with x, y, z and c in matlab

Read abouit contour3, slice.

contour plot for 3d data with x, y, z and c in matlab

Read abouit contour3, slice.

7 days ago | 0

Answered

How to use a shapefile to extract regions outside the shapefile?

Read the shape file using shaperead. This has single/ multiple regions. Pick one closed region fromt he shape file Take the ...

How to use a shapefile to extract regions outside the shapefile?

Read the shape file using shaperead. This has single/ multiple regions. Pick one closed region fromt he shape file Take the ...

13 days ago | 0

Answered

Choose n points randomly from a circle, how to calculate the probability that all the points are in one semicircle?

% Generate circle r = 1. ; % radius th = linspace(0,2*pi) ; x = r*cos(th) ; y = r*sin(th) ; % Geenrate random points...

Choose n points randomly from a circle, how to calculate the probability that all the points are in one semicircle?

% Generate circle r = 1. ; % radius th = linspace(0,2*pi) ; x = r*cos(th) ; y = r*sin(th) ; % Geenrate random points...

13 days ago | 0

Answered

Generate (X,Y) grid coordinates from within contour boundary

Use boundary to get the boundary of your required region. Use inpolygon with the generated grid and boundary points to get the...

Generate (X,Y) grid coordinates from within contour boundary

Use boundary to get the boundary of your required region. Use inpolygon with the generated grid and boundary points to get the...

13 days ago | 0

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Answered

I want to read image name to be an string

imgNames = dir('*.jpg') ; N = length(imgNames) ; for i = 1:N img = imgNames(i).name end

I want to read image name to be an string

imgNames = dir('*.jpg') ; N = length(imgNames) ; for i = 1:N img = imgNames(i).name end

15 days ago | 0

Answered

How to draw three graphs together to make a composite figure

C = [0 0 ; 1 0 ; 1 1 ; 0 1 ; 0 0 ] ; A = [0 1 ; 0 1.25 ; 1 1.25 ; 1 1 ; 0 1] ; B = [1 0 ; 1 1 ; 1.25 1 ; 1.25 0 ; 1 0] ; ...

How to draw three graphs together to make a composite figure

C = [0 0 ; 1 0 ; 1 1 ; 0 1 ; 0 0 ] ; A = [0 1 ; 0 1.25 ; 1 1.25 ; 1 1 ; 0 1] ; B = [1 0 ; 1 1 ; 1.25 1 ; 1.25 0 ; 1 0] ; ...

15 days ago | 1

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Answered

Converting output from 'find' into a logical

Read about ind2vec. By the way you can straightaway logical, there is no need to use find.

Converting output from 'find' into a logical

Read about ind2vec. By the way you can straightaway logical, there is no need to use find.

15 days ago | 0

Answered

Find the surface area of an object using stereo vision.

After using delaunayTriangulation, you have vertices and nodal connectivity in hand. Then you can use this function to get the a...

Find the surface area of an object using stereo vision.

After using delaunayTriangulation, you have vertices and nodal connectivity in hand. Then you can use this function to get the a...

16 days ago | 0

Answered

Is there a way to come up with all the combination between 0 and 1 that sum up to equal 1?

x = 0:1/100:1 ; id = nchoosek(1:length(x),4) ; thesum = sum(x(id),2) ; % find sum == 1 idx = thesum==1 ; iwant = x(id...

Is there a way to come up with all the combination between 0 and 1 that sum up to equal 1?

x = 0:1/100:1 ; id = nchoosek(1:length(x),4) ; thesum = sum(x(id),2) ; % find sum == 1 idx = thesum==1 ; iwant = x(id...

16 days ago | 1

Answered

Damping ratio computing from a MATLAB plot

For natural frequency you need to look into fft. Damping ratio can be calculated using logarithamic decrement approach. https:...

Damping ratio computing from a MATLAB plot

For natural frequency you need to look into fft. Damping ratio can be calculated using logarithamic decrement approach. https:...

16 days ago | 0

Answered

How to extract data from a cell array?

Already you have the cells in your desired way. You can access them using C{1} , C{2}, C{3} . You need to store them again...

How to extract data from a cell array?

Already you have the cells in your desired way. You can access them using C{1} , C{2}, C{3} . You need to store them again...

17 days ago | 0

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Answered

How do I restrict a decimal number to 2 significant decimal places?

Refer for the same discussion: https://in.mathworks.com/matlabcentral/answers/79928-reduce-precision-of-a-number

How do I restrict a decimal number to 2 significant decimal places?

Refer for the same discussion: https://in.mathworks.com/matlabcentral/answers/79928-reduce-precision-of-a-number

17 days ago | 0

Answered

how to divide a region into elements where each element is 9 node element in matlab?

You can extend the following to your needs. https://in.mathworks.com/matlabcentral/fileexchange/33731-meshing-a-plate-using-...

how to divide a region into elements where each element is 9 node element in matlab?

You can extend the following to your needs. https://in.mathworks.com/matlabcentral/fileexchange/33731-meshing-a-plate-using-...

17 days ago | 0

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Answered

interpolation with non-zero data only when using griddata

Get the boundary of your required region use inpolygon to get the points lying inside and outside the boundary Make the data f...

interpolation with non-zero data only when using griddata

Get the boundary of your required region use inpolygon to get the points lying inside and outside the boundary Make the data f...

17 days ago | 0

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Answered

how to solve the nonlinear equatios?

Try this. syms v T p=30;d=1;lamda=0.8;c=10;r=35;h=0.05;chi=200;k=0.02;b=7;a =0.01; w = k*(1-exp(-a*chi)); M=k*a; equation1...

how to solve the nonlinear equatios?

Try this. syms v T p=30;d=1;lamda=0.8;c=10;r=35;h=0.05;chi=200;k=0.02;b=7;a =0.01; w = k*(1-exp(-a*chi)); M=k*a; equation1...

21 days ago | 0