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

Professional Interests: Mathematical Computing

Answered

Identifying the circle that fits the outer white pixels in a binary image (or make external mask)

I = imread("SampleXRmorph.PNG"); [y,x] = find(I) ; % Get center of cricle C = [mean(x) mean(y)] ; % GEt raidus d = sqrt...

Identifying the circle that fits the outer white pixels in a binary image (or make external mask)

I = imread("SampleXRmorph.PNG"); [y,x] = find(I) ; % Get center of cricle C = [mean(x) mean(y)] ; % GEt raidus d = sqrt...

3 days ago | 1

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Answered

How to fill the area between contour line and upper bound.

Get your required curve/ line coordinates; form a closed polygon and use patch/ area.

How to fill the area between contour line and upper bound.

Get your required curve/ line coordinates; form a closed polygon and use patch/ area.

3 days ago | 0

Answered

How to divide vector to matrix(same row and column)

To remove extra elements and convert to square matrix A = rand(82580526,1) ; l = length(A) ; % GEt the nearest perfect squ...

How to divide vector to matrix(same row and column)

To remove extra elements and convert to square matrix A = rand(82580526,1) ; l = length(A) ; % GEt the nearest perfect squ...

3 days ago | 0

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Answered

Plotting user inputs in a 2D plot

prompt = 'Enter any number that you like:'; %{ I only want the user to enter a maximum of 10 numbers. %} N = 10 ; figure...

Plotting user inputs in a 2D plot

prompt = 'Enter any number that you like:'; %{ I only want the user to enter a maximum of 10 numbers. %} N = 10 ; figure...

3 days ago | 0

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Answered

2D plot of a matrix

Read about importdata to load the data into MATLAB. You can normalize an array x to [0,1] using: norm_x = (x-min(x))/(max(x)-...

2D plot of a matrix

Read about importdata to load the data into MATLAB. You can normalize an array x to [0,1] using: norm_x = (x-min(x))/(max(x)-...

4 days ago | 0

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Answered

how to write a for loop in this case?

daily_tmax = cell(length(tmax),1) ; for i = 1:length(tmax) daily_tmax{i} = squeeze(mean(reshape(tmax{i}, size(tmax{i}, 1)...

how to write a for loop in this case?

daily_tmax = cell(length(tmax),1) ; for i = 1:length(tmax) daily_tmax{i} = squeeze(mean(reshape(tmax{i}, size(tmax{i}, 1)...

4 days ago | 1

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Answered

Read spesific rowintervals from .txt file and store them

I = [12 40 68] ; iwant = cell(length(I),1) ; for i = 1:length(I) C = textscan(fid,'%.6f %.6f',npoints,'delimiter','\n',...

Read spesific rowintervals from .txt file and store them

I = [12 40 68] ; iwant = cell(length(I),1) ; for i = 1:length(I) C = textscan(fid,'%.6f %.6f',npoints,'delimiter','\n',...

4 days ago | 0

Answered

How do I plot a line graph from scatter plot?

clc clear all A = 0.05; l_r = 2; %Wave length of the road v = 45; %Speed(m/s) P = l_r/v; %Period %Om = 1/P*2*pi; %Forcin...

How do I plot a line graph from scatter plot?

clc clear all A = 0.05; l_r = 2; %Wave length of the road v = 45; %Speed(m/s) P = l_r/v; %Period %Om = 1/P*2*pi; %Forcin...

5 days ago | 1

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Answered

For loop using strings

Let A be your data of size m*3. for i = 1:3 [pks_x_sit1,locs_x_sit1] = findpeaks(A(:,i),'MinPeakHeight',1.25); nr_...

For loop using strings

Let A be your data of size m*3. for i = 1:3 [pks_x_sit1,locs_x_sit1] = findpeaks(A(:,i),'MinPeakHeight',1.25); nr_...

5 days ago | 0

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Answered

How to graph using a for loop

YOu need not use a loop as the other user has suggested you. If you use a loop, you need to intiilaize the array and save it in ...

How to graph using a for loop

YOu need not use a loop as the other user has suggested you. If you use a loop, you need to intiilaize the array and save it in ...

6 days ago | 1

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Answered

How to get all values existing in arrays/matrices?

Read about unique a = myArray(:) ; [cnt_unique, unique_a] = hist(a,unique(a)) ;

How to get all values existing in arrays/matrices?

Read about unique a = myArray(:) ; [cnt_unique, unique_a] = hist(a,unique(a)) ;

6 days ago | 1

Answered

In an image to set reference coordinate and get coordinates of color points .

If I is your matrix of image ..use [y,x] = find(I==val) ; where val is your pixel value you want. If I is m*n*3 RGB image....

In an image to set reference coordinate and get coordinates of color points .

If I is your matrix of image ..use [y,x] = find(I==val) ; where val is your pixel value you want. If I is m*n*3 RGB image....

6 days ago | 0

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Answered

Create random paths between two known points in 3D

A = [0,0,0] ; B = [1,1,1] ; N = 10 ; x = (B(1)-A(1)).*rand(N) + A(1); y = (B(2)-A(2)).*rand(N) + A(2); z = (B(3)-A(3)).*...

Create random paths between two known points in 3D

A = [0,0,0] ; B = [1,1,1] ; N = 10 ; x = (B(1)-A(1)).*rand(N) + A(1); y = (B(2)-A(2)).*rand(N) + A(2); z = (B(3)-A(3)).*...

8 days ago | 0

Answered

how to detect border irregularity?

If (x,y) are your boundary points. % Get bounding box x0 = min(x) ; x1 = max(x) ; y0 = min(y) ; y1 = max(y) ; % A = [...

how to detect border irregularity?

If (x,y) are your boundary points. % Get bounding box x0 = min(x) ; x1 = max(x) ; y0 = min(y) ; y1 = max(y) ; % A = [...

10 days ago | 0

Answered

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side. Error in Q38 (line 10) Mat(row,col)=t1

You have to intilize them either as a cell or matrix. I am intializing as cell. check below: %Questions#38 clc clear close ...

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side. Error in Q38 (line 10) Mat(row,col)=t1

You have to intilize them either as a cell or matrix. I am intializing as cell. check below: %Questions#38 clc clear close ...

11 days ago | 0

Answered

What is difference between indexing using ".var" and "{}"?

.var is to access fields of structures. {} is to access cells. Read about structures and cells.

What is difference between indexing using ".var" and "{}"?

.var is to access fields of structures. {} is to access cells. Read about structures and cells.

11 days ago | 0

Answered

I want someone who can help me to see a grid and airfoil in the same plot , here is my code

clear all; close all; clc; Mi=0.5; T=300; P=1; gamma = 1.4; R=287; vinf = sqrt(gamma*R*T)*Mi; Nx = 100; % x ...

I want someone who can help me to see a grid and airfoil in the same plot , here is my code

clear all; close all; clc; Mi=0.5; T=300; P=1; gamma = 1.4; R=287; vinf = sqrt(gamma*R*T)*Mi; Nx = 100; % x ...

12 days ago | 0

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Answered

How to quickly find the first non-zero element without iterations in all columns in a sparse matrix?

[val,id] = min(abs(A)) ; Use the minimum function.

How to quickly find the first non-zero element without iterations in all columns in a sparse matrix?

[val,id] = min(abs(A)) ; Use the minimum function.

12 days ago | 0

Answered

Cannot plot iterations.

clear all ; clc; t=20:30;%range of inital velocities plotted dt = min(diff(t)) ; g = 9.81 ; figure; hold on for i=20:3...

Cannot plot iterations.

clear all ; clc; t=20:30;%range of inital velocities plotted dt = min(diff(t)) ; g = 9.81 ; figure; hold on for i=20:3...

13 days ago | 0

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Answered

How to take two inputs simultaneously from the user ?

x=input('Enter range of x :'); xf1 = x(1) ; xf2 = x(2) ; Also have a look on deal.

How to take two inputs simultaneously from the user ?

x=input('Enter range of x :'); xf1 = x(1) ; xf2 = x(2) ; Also have a look on deal.

13 days ago | 0

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Answered

Having a problem with for loops. In the given code I need to store the 4 values in 4 seperate places like x1,x2,x3,x4, is this the correct way to write it ? and if my xf is defines in linspace then I'm having a error that the indices aren't compatib

x = rand(1,4) ; % your four values goes here x(1) % x1 x(2) % x2 x(3) % x3 x(4) % x4

Having a problem with for loops. In the given code I need to store the 4 values in 4 seperate places like x1,x2,x3,x4, is this the correct way to write it ? and if my xf is defines in linspace then I'm having a error that the indices aren't compatib

x = rand(1,4) ; % your four values goes here x(1) % x1 x(2) % x2 x(3) % x3 x(4) % x4

13 days ago | 0

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Answered

How to read mutlple .h5 files

hfiles = dir('*.h5') ; N = length(hfiles) ; % loop for each file for i = 1:N thisfile = hfiles(i).name ; % read...

How to read mutlple .h5 files

hfiles = dir('*.h5') ; N = length(hfiles) ; % loop for each file for i = 1:N thisfile = hfiles(i).name ; % read...

14 days ago | 0

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Answered

plotting x,y,z vertices as mesh

clc;clear;close all; test = xlsread('data.xls'); x=test(:,2); y=test(:,3); z=test(:,4); tri = delaunay(x,y); ...

plotting x,y,z vertices as mesh

clc;clear;close all; test = xlsread('data.xls'); x=test(:,2); y=test(:,3); z=test(:,4); tri = delaunay(x,y); ...

20 days ago | 2

Answered

How do I graph game scores over time?

You need to save the result into a vector and plot at the end. This is included in the below code. scoreA=0; %score for player...

How do I graph game scores over time?

You need to save the result into a vector and plot at the end. This is included in the below code. scoreA=0; %score for player...

24 days ago | 1

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Answered

How to divide the curve into two sections and then fit straight line for both sections separately and get intersection of the lines?

Load the excel file into MATLAB using xlsread. Divide the data into sections using data1 = data(1:1000,:) ; data2 = data(1001:...

How to divide the curve into two sections and then fit straight line for both sections separately and get intersection of the lines?

Load the excel file into MATLAB using xlsread. Divide the data into sections using data1 = data(1:1000,:) ; data2 = data(1001:...

24 days ago | 0

Answered

use of comma & semi colon

That means....in the matrix A in the first row (1) the columns one to 9 are filled with [ 30, 25, 16, 32, 15, 37, 18, ...

use of comma & semi colon

That means....in the matrix A in the first row (1) the columns one to 9 are filled with [ 30, 25, 16, 32, 15, 37, 18, ...

24 days ago | 0

Answered

Combine two column vectors when importing data from .csv into one

Let A be integer and B be decimal iwant = A+B/10 ;

Combine two column vectors when importing data from .csv into one

Let A be integer and B be decimal iwant = A+B/10 ;

24 days ago | 0