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KSSV


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7.224 total contributions since 2011

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

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Answered
How to calculate the derivative and deviation of a series of data
To find deviation i.e standard deviation use std. To find derivative ..if you have time step use... d = diff(data)/dt ; Alo...

ongeveer 16 uur ago | 0

Answered
How to run a code several times using a for loop
Make your given code into a function with input and output. Output should be your required matrices/ data. Make output into ...

1 dag ago | 0

Answered
K means image clustering with time series data
Let x be your 1D data. Assuming it column vector. t = 1:length(x); t = t'; idx = kmeans([t x],3);

1 dag ago | 0

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Answered
How do I take the 'left' side of a matrix? (row-wise)
For your first example: b = a(:,1:3) ; If A is your matrix..if your first first n columns B = A(:,1:n) ; If you want fir...

2 dagen ago | 0

Answered
Making a matrix act like a coordinate plane
x = -50:50 ; y = -50:50 ; [X,Y] = meshgrid(x,y) ;

3 dagen ago | 0

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Answered
get indices where the value is 0
Let A be your vector....to get indices of zero use... idx = find(A==0) ; % gives indices directly idx_l = A==0 ; % gives...

3 dagen ago | 0

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Two different ways of using iterations
In the first case, you are not saving the result. Check the below. load tal v_stor=zeros(1,length(V)); v_liten=zeros(1,lengt...

3 dagen ago | 1

Answered
How to store vector in a loop and print into excel file all at once?
You are wrtitng R in the xlswrite command. Replace R with Es. L = length(y_train_corr(1,:)); R = corrcoef(y_train_corr(:,2),y_...

4 dagen ago | 0

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f(x,y)<=0
It depends on what your function f is. Your function f will show some relation between x and y. Also you should define range of ...

4 dagen ago | 0

Answered
Problems of convert decimal number to a string
iwant = sprintf("0.12f 0.12f 0.12f",num) ; Try with sprintf. You can split each number into a cell using num2cell, and use ce...

4 dagen ago | 0

Answered
Put every 3 data points in matrix A into a separate row in matrix B.
A = 1:9 ; iwant = reshape(A,3,3)' ;

5 dagen ago | 0

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Answered
How can i make my results occupy less space on my plot?
n = 101; % Number of grids dy = 1.0 / (n-1); Re = 100; % Reynolds Number we define phi_new = zeros(1,n); % St...

6 dagen ago | 1

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Answered
Easy Substitution (variable)
delta = subs(delta,v)

6 dagen ago | 0

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Answered
Montage Function Problems in MATLAB
Try montage({im11, im22, im33, im44}) ; If all your images are 3D, try montage(cat(3,img1,img2,img3,img4)) ;

6 dagen ago | 0

Answered
How to Run a Code for all files in a folder
You input the filename to the function transformdata and save the output into cells. files = dir('*.csv') ; N = length(files...

6 dagen ago | 0

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Answered
if greater than in for loop
for k = 1:length(seven) if seven(k) > 100 seven(k) = seven(k) - 25 ; end end

7 dagen ago | 0

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Answered
how to get coordinates of a marker
You can plot your required circle given center and radius using the below method. C = [346 278] ; % Center of the circle R ...

7 dagen ago | 0

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Answered
How can I color the pixels of my image depending of it's value in an equation?
Let I be your image pixle matrix with the values Prob repalced using the shown formula. % To repalce values less than Prob id...

7 dagen ago | 0

Answered
Insert missing values in specified positions and use for loop
This problem is dicussed multiple times....you can checki there in this useful link: https://in.mathworks.com/matlabcentral/ans...

8 dagen ago | 0

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Answered
How do I colour a band between 2 sets of data of different length
x=randn(1,200) ; t=1:200 ; y=4+randn(1,180); t1=1:180 ; % Append NaN's in y1 to extend it to 1:200. n = length(t)-length(...

8 dagen ago | 0

Answered
Contour on a contourf plot
contourf gives you a colored plot. It fills the contour lines region with colors. To get whay you want use: c = contour(Xi,Yi,Z...

8 dagen ago | 0

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Answered
Extracting data from Text file
fid = fopen("Ocb_pl.txt") ; S = textscan(fid,"%d %f %f %f %f\n",'HeaderLines',135) ; fclose(fid) ; S{1}

8 dagen ago | 0

Answered
How to select the first appearance of the minimum value?
d = abs(A-b) ; [d,idx] = sort(d) ; % sort them in increasing order iwant = min(A(idx(1:2))) You can try knnsearch...read ab...

8 dagen ago | 1

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Answered
How to calculate average of three columns from textfile?
txtFiles = dir('*.txt') ; % get all files N = length(txtFiles) ; % total number of files M = zeros(N,3) ; % mean int...

8 dagen ago | 0

Answered
Shrink image without using imresize
Let I be your image of size 1200x1100. [m,n,p] = size(I) ; [X,Y] = meshgrid(1:m,1:n) ; xi = linspace(1,m,650) ; yi = lin...

8 dagen ago | 0

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Answered
Problem in contour plot using ''for '' loop.
May be you are looking for contour(T,G,M)

8 dagen ago | 0

Answered
How to ensure that the value in my mxn matrix does not exceed certain value?
for i = 1:2 for j = 1:2 A(i,j) = input("enter value:") ; while A(i,j) > 2 A(i,j) = input("enter value, less...

8 dagen ago | 0

Answered
How can i extract specific points that meet a condition from given data?
I will use histogram, and get the indices. clc; clear all ; data = importdata("xycoords.txt") ; x = data(:,1) ; y = dat...

8 dagen ago | 0

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Answered
Counting elements in cell array
If C is your cell array of strings. n = nnz(strcmp(C,'cat'));

8 dagen ago | 0

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Answered
How can the center be determined by the Kmeans method?
[idx,C,D] = kmeans(grayImge(:),numberOfclasses) ; C is your cneter. Read about kmeans. You can your center along with the fu...

8 dagen ago | 0

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