https://sites.google.com/site/kolukulasivasrinivas/

Professional Interests: Mathematical Computing

Answered

Fitting a parametric function to a dataset

Have a look on this: https://in.mathworks.com/matlabcentral/fileexchange/33610-a-tour-of-parametric-equations

Fitting a parametric function to a dataset

Have a look on this: https://in.mathworks.com/matlabcentral/fileexchange/33610-a-tour-of-parametric-equations

ongeveer 2 uur ago | 0

Answered

How to zero the data points behind the line of figure?

clear all;clc;close all; data = ones(100,200); x = (0:1:size(data,2)-1)*0.1; y =(0:1:size(data,1)-1)*0.1; surf(x,y,data*100)...

How to zero the data points behind the line of figure?

clear all;clc;close all; data = ones(100,200); x = (0:1:size(data,2)-1)*0.1; y =(0:1:size(data,1)-1)*0.1; surf(x,y,data*100)...

ongeveer 2 uur ago | 0

Answered

How can I merge my data set based on the time in MATLAB?

data_1_y_axes=[0,1,3,5,4,6,8,9,7] ; time_1_x_axes=[.02,0.03,.05,.06,.07,0.08,0.09,.1,.2] ; data_2_y_axes=[0,2,4,5,2,7,5,7,5] ;...

How can I merge my data set based on the time in MATLAB?

data_1_y_axes=[0,1,3,5,4,6,8,9,7] ; time_1_x_axes=[.02,0.03,.05,.06,.07,0.08,0.09,.1,.2] ; data_2_y_axes=[0,2,4,5,2,7,5,7,5] ;...

3 dagen ago | 0

Answered

transpose loop without operator

A = rand(3) ; [m,n] = size(A) ; B = A ; for i = 1:m for j = 1:n B(i,j) = A(j,i) ; end end

transpose loop without operator

A = rand(3) ; [m,n] = size(A) ; B = A ; for i = 1:m for j = 1:n B(i,j) = A(j,i) ; end end

3 dagen ago | 0

Answered

how can ı solve without curve fitting?

Read about polyfit. x=0:5; y=[15, 10, 9, 6, 2, 0]; p = polyfit(x,y,4) ; xi = 0:0.1:5 ; plot(x,y,'or',xi,polyval(p,x...

how can ı solve without curve fitting?

Read about polyfit. x=0:5; y=[15, 10, 9, 6, 2, 0]; p = polyfit(x,y,4) ; xi = 0:0.1:5 ; plot(x,y,'or',xi,polyval(p,x...

3 dagen ago | 1

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Answered

Please, how to plot for this code?

Read about element by element operations. k = -2:0.1:2; g = ((2*cos(2*k))-2)./(1i*k); % use ./ plot(k,abs(g)) hold on pl...

Please, how to plot for this code?

Read about element by element operations. k = -2:0.1:2; g = ((2*cos(2*k))-2)./(1i*k); % use ./ plot(k,abs(g)) hold on pl...

3 dagen ago | 0

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Answered

Randomly concatenating audio files

N = 10 ; C = cell(N,1) ; % C(2:2:end) = insert your silence audio idx = 1:2:N ; % left indices to insert your required ...

Randomly concatenating audio files

N = 10 ; C = cell(N,1) ; % C(2:2:end) = insert your silence audio idx = 1:2:N ; % left indices to insert your required ...

3 dagen ago | 0

Answered

How can I plot a circle use given point?

If you have points.....you can find the radius of circle. It depends on how many points you know. Frame the distance formula a...

How can I plot a circle use given point?

If you have points.....you can find the radius of circle. It depends on how many points you know. Frame the distance formula a...

3 dagen ago | 0

Answered

For Loop range error

t0 = -0.5 ; % initial time t1 = 50 ; % final time dt = 0.5 ; % time step T = t0:dt:t1 ; % create time vector N = le...

For Loop range error

t0 = -0.5 ; % initial time t1 = 50 ; % final time dt = 0.5 ; % time step T = t0:dt:t1 ; % create time vector N = le...

3 dagen ago | 0

Answered

read the first 3 lines of a file and extract variables without reading the rest

fid = fopen('file.txt'); tline = fgetl(fid); val = cell(3,1) ; n = 1 ; val{n} = str2double(regexprep(tline, {'\D*([\d\....

read the first 3 lines of a file and extract variables without reading the rest

fid = fopen('file.txt'); tline = fgetl(fid); val = cell(3,1) ; n = 1 ; val{n} = str2double(regexprep(tline, {'\D*([\d\....

4 dagen ago | 0

Answered

how to plot y(t)

Check the expressions thoroughly....not sure did I enter correct. fs=10; Ts = 1/fs; c = 10; t = -1:0.01:1; b=1...

how to plot y(t)

Check the expressions thoroughly....not sure did I enter correct. fs=10; Ts = 1/fs; c = 10; t = -1:0.01:1; b=1...

6 dagen ago | 1

Answered

2D interpolation of scattered data

x = [1 2 3 4 5]; y = [1 2 3 4 5]; z = [1 2 1 2 3; 3 4 3 4 5; 5 6 5 6 7; 3 4 3 4 5; 1 2 1 2 3]; [X,Y] = meshgrid(x,y) ; i...

2D interpolation of scattered data

x = [1 2 3 4 5]; y = [1 2 3 4 5]; z = [1 2 1 2 3; 3 4 3 4 5; 5 6 5 6 7; 3 4 3 4 5; 1 2 1 2 3]; [X,Y] = meshgrid(x,y) ; i...

6 dagen ago | 1

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Answered

How can i count the number of point in each grid?

Get each box coordinates, this box is a polygon and then use the function inpolygon. Run a loop for each box.

How can i count the number of point in each grid?

Get each box coordinates, this box is a polygon and then use the function inpolygon. Run a loop for each box.

7 dagen ago | 0

Answered

how to plot of a infinite series in 2D

Hints: Define x as an array using linspace after defining min and max value of x. Define t as an array using linspace after d...

how to plot of a infinite series in 2D

Hints: Define x as an array using linspace after defining min and max value of x. Define t as an array using linspace after d...

8 dagen ago | 0

Answered

How to implement the Fourier series method of heat equation?

You shoul dhave a look on symbolic math toolbox. Rfer this answer: https://in.mathworks.com/matlabcentral/answers/413890-the-ex...

How to implement the Fourier series method of heat equation?

You shoul dhave a look on symbolic math toolbox. Rfer this answer: https://in.mathworks.com/matlabcentral/answers/413890-the-ex...

8 dagen ago | 0

Answered

I have encountered a problem and would like to ask everyone to help solve it. The problem to be solved is how to close the following two fitted curves. Thank you very much for your enthusiastic answers.

load dataA.mat %x1=dataA(:,1); %y1=dataA(:,2); f1 = fit(xAbove,yAbove,'smoothingspline','SmoothingParam',0.0001);%smoothingsp...

I have encountered a problem and would like to ask everyone to help solve it. The problem to be solved is how to close the following two fitted curves. Thank you very much for your enthusiastic answers.

load dataA.mat %x1=dataA(:,1); %y1=dataA(:,2); f1 = fit(xAbove,yAbove,'smoothingspline','SmoothingParam',0.0001);%smoothingsp...

8 dagen ago | 0

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Answered

Limit Lines/Plane on a 3D Plot

In 3D your (x,y) points remain same on the line and your z coordinate will vary. You can write a small function for you need. ...

Limit Lines/Plane on a 3D Plot

In 3D your (x,y) points remain same on the line and your z coordinate will vary. You can write a small function for you need. ...

8 dagen ago | 0

Answered

Hello everyone, how do you fit two curves into a closed curve?My code is as follows.

load dataA ; load dataB ; C1 = [xAbove yAbove] ; C2 = [xBelow yBelow] ; % MErge them C = [C1 ;C2] ; idx = boundary(C(:,...

Hello everyone, how do you fit two curves into a closed curve?My code is as follows.

load dataA ; load dataB ; C1 = [xAbove yAbove] ; C2 = [xBelow yBelow] ; % MErge them C = [C1 ;C2] ; idx = boundary(C(:,...

8 dagen ago | 0

Answered

Laplace equation, FEM

This is the book for you: https://www.amazon.in/Finite-Element-Mechanical-Aerospace-Engineering/dp/0849300967

Laplace equation, FEM

This is the book for you: https://www.amazon.in/Finite-Element-Mechanical-Aerospace-Engineering/dp/0849300967

9 dagen ago | 0

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Answered

Hello everyone, how to divide a piece of data into upper and lower parts along the y-axis with C point and D point as the boundary?

Option 1: You should get the indices of C, D in the given points of curve. Read about knnsearch, this will give indices of point...

Hello everyone, how to divide a piece of data into upper and lower parts along the y-axis with C point and D point as the boundary?

Option 1: You should get the indices of C, D in the given points of curve. Read about knnsearch, this will give indices of point...

9 dagen ago | 0

Answered

How to convert 8 Binary images of size 256 x 256 into a Grayscale image of same size, i.e., 256 x 256?

images = dir('*.tiff'); N = length(images) ; iwant = cell(N,1) ; for i = 1:N iwant{i} = imread(images(i).name) ; ...

How to convert 8 Binary images of size 256 x 256 into a Grayscale image of same size, i.e., 256 x 256?

images = dir('*.tiff'); N = length(images) ; iwant = cell(N,1) ; for i = 1:N iwant{i} = imread(images(i).name) ; ...

11 dagen ago | 0

Answered

How to merge data with latitude and longitude?

latitude = [-3.63965:-0.00449:-8.12601]; longitude = [-37.5098:0.00453:-32.9831]; [matrix_latitude, matrix_longitude] = meshg...

How to merge data with latitude and longitude?

latitude = [-3.63965:-0.00449:-8.12601]; longitude = [-37.5098:0.00453:-32.9831]; [matrix_latitude, matrix_longitude] = meshg...

11 dagen ago | 0

Answered

finding last column values

Let A be your 12094*3 matrix and P be your 7*2 matrix. idx = inpolygon(A(:,1),A(:,2),P(:,1),P(:,2)) ; iwant = A(idx,:) ;

finding last column values

Let A be your 12094*3 matrix and P be your 7*2 matrix. idx = inpolygon(A(:,1),A(:,2),P(:,1),P(:,2)) ; iwant = A(idx,:) ;

11 dagen ago | 1

Answered

Index in position 1 is invalid. Array indices must be positive integers or logical values. can anyone help me solve the problem?

T_1=tf(num1(1,:),den1); The above line is ridiculous. Points to note: tf is a scalar whose value is 20. Why indexing? num1 h...

Index in position 1 is invalid. Array indices must be positive integers or logical values. can anyone help me solve the problem?

T_1=tf(num1(1,:),den1); The above line is ridiculous. Points to note: tf is a scalar whose value is 20. Why indexing? num1 h...

11 dagen ago | 0

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Answered

Counting Specific Number of Consecutive Values in a Matrix

A = [1 0 0 1 1 1 0 1 1 1 1 1 1 0 1 1 0 1 1 1 1 1 0 1 1 0 1 1 1 1 1 1 1 0 1]; % First column x =...

Counting Specific Number of Consecutive Values in a Matrix

A = [1 0 0 1 1 1 0 1 1 1 1 1 1 0 1 1 0 1 1 1 1 1 0 1 1 0 1 1 1 1 1 1 1 0 1]; % First column x =...

11 dagen ago | 1

Answered

a function that will give output of volume of sphere and circle.I have no idea about function..help me out with the code

The volume of sphere is: The area of circle is:

a function that will give output of volume of sphere and circle.I have no idea about function..help me out with the code

The volume of sphere is: The area of circle is:

12 dagen ago | 0

Answered

pi approximation using a series

x = 0 ; n = 0 ; while ~(abs(pi-x) <= 10^-4 ) x = x+4*(-1)^n/(2*n+1) ; n = n+1 ; end

pi approximation using a series

x = 0 ; n = 0 ; while ~(abs(pi-x) <= 10^-4 ) x = x+4*(-1)^n/(2*n+1) ; n = n+1 ; end

12 dagen ago | 0

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