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# KSSV

### INCOIS

6,718 total contributions since 2011

https://sites.google.com/site/kolukulasivasrinivas/
Professional Interests: Mathematical Computing

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Answered
Elements in array and matrix
Read about input and unique.

1 day ago | 1

Answered
how can I convert many images from m x n x 3 to m x n by rgb2gray?
img = dir('*.jpeg') ; N = length(img) ; for i = 1:N thisimg = img(i).name ; I = imread(thisimg) ; Ig = rgb2...

1 day ago | 1

Answered
Plotting two variables from a loop
% Constants g=9.81; m=1.5; A=0.028; Cd=0.8; rho=1.225; B=(rho*Cd*A)/2; Dt=1e-6; % Initial values x=0; y=6.4008; %21...

2 days ago | 1

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Answered
plot values in the loop
p=3 ; k = 1:p ; val = zeros(1,p) ; for i = 1:length(p) %something if %something d=d+1 val(i) = ...

3 days ago | 0

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How to plot an inversely proportional graph ?
plot(k,1./T) ; You can find the inverse/ reciprocal using 1./T.

3 days ago | 0

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Answered
How to make a function that calculates percentage change in a vector
Loop: x=csvread('gdp.csv') for i=1:length(x)-1 p = (x(i+1)-x(i))/(x(i)) end Vector: p = diff(x)./x(1:end-1) ;

3 days ago | 0

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How get this program to calculate derivative properly?
Yn=A*sin(w*t); dYn = A*w*cos(w*t) ;

3 days ago | 0

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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 =...

4 days ago | 0

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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 ...

5 days ago | 0

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Answered
Common numbers between arrays
Read about intersection.

5 days ago | 1

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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...

6 days ago | 0

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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.

6 days ago | 0

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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 ;

6 days 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...

6 days 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)) ;

6 days ago | 0

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Adding Array elements from one element to another
Let A be your array. iwant = sum(A(487146:513795)) ;

6 days 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...

10 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.

10 days ago | 1

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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...

10 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...

10 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)-...

11 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)...

11 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',...

11 days ago | 0

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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...

12 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_...

12 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 ...

13 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)) ;

13 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....

13 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)).*...

15 days ago | 0

Answered
How to change from cell to array
Read about cell2mat.

17 days ago | 0

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