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

Professional Interests: Mathematical Computing

Answered

converting 2D XY coordinated into Grid format

It depends whether your data is gridded or scattered. Follow the below code to get what you want. Let A be your m*2 array. x =...

converting 2D XY coordinated into Grid format

It depends whether your data is gridded or scattered. Follow the below code to get what you want. Let A be your m*2 array. x =...

etwa 20 Stunden ago | 0

Answered

Area of intersection of two ellipses

You can follow the below steps. For the two ellipses i.e get coordinates of both the ellipses. Let L1, L2 be your coordinates ...

Area of intersection of two ellipses

You can follow the below steps. For the two ellipses i.e get coordinates of both the ellipses. Let L1, L2 be your coordinates ...

ein Tag ago | 0

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I can’t get the program to run for some reason. I want to use for loops for this program.

You need not to use two for loops.....that is a wrong idea. This is what you should do: Ti = 0; Tinc = pi/180; Tf = pi...

I can’t get the program to run for some reason. I want to use for loops for this program.

You need not to use two for loops.....that is a wrong idea. This is what you should do: Ti = 0; Tinc = pi/180; Tf = pi...

2 Tage ago | 0

Answered

need Matlab program to count the number of lines until dollar sign is given

Read about strfind. YOu can search for you string using this.

need Matlab program to count the number of lines until dollar sign is given

Read about strfind. YOu can search for you string using this.

2 Tage ago | 0

Answered

Single line of code for vectorization, Need Help!!

r = [0.1 0.2 0.3 0.4 0.5] ; h = [0.2 0.3 0.4 0.5] ; [r,h] = meshgrid(r,h) ; v = 1/3*pi*r.^r.*h ;

Single line of code for vectorization, Need Help!!

r = [0.1 0.2 0.3 0.4 0.5] ; h = [0.2 0.3 0.4 0.5] ; [r,h] = meshgrid(r,h) ; v = 1/3*pi*r.^r.*h ;

2 Tage ago | 0

Answered

How do you detect duplicate values within a random array?

If you want to use inbuilt functions......you can use unique. Read about it. Let A be your array. B = unique(A) ; if lengt...

How do you detect duplicate values within a random array?

If you want to use inbuilt functions......you can use unique. Read about it. Let A be your array. B = unique(A) ; if lengt...

2 Tage ago | 0

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Answered

Plotting question using data (water saturation)

sat_data = water_sattemp_data ; plot(sat_data(:,1),sat_data(:,2)) ;

Plotting question using data (water saturation)

sat_data = water_sattemp_data ; plot(sat_data(:,1),sat_data(:,2)) ;

2 Tage ago | 0

Answered

Adding Array elements from one element to another

Let A be your array. iwant = sum(A(487146:513795)) ;

Adding Array elements from one element to another

Let A be your array. iwant = sum(A(487146:513795)) ;

2 Tage ago | 0

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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...

6 Tage 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.

6 Tage ago | 1

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...

6 Tage 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...

7 Tage 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)-...

8 Tage 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)...

8 Tage 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',...

8 Tage 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...

9 Tage 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_...

9 Tage 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 ...

9 Tage 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)) ;

9 Tage 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....

9 Tage 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)).*...

12 Tage 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 = [...

13 Tage 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 ...

14 Tage 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.

14 Tage 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 ...

15 Tage 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.

15 Tage 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...

16 Tage ago | 0

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