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KSSV


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7,231 total contributions since 2011

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

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Answered
order of filenames is wrong
Use this fileexchange function: https://in.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

1 hour ago | 0

Answered
Plotting with gaps in x-axis data
It looks like you have a non continuous x-axis data. This problem occurs when you have such data and try to plot. Make x-axis ...

1 hour ago | 0

Answered
write a matlab code that generate a random number, then divide the generated number by 4 if its even number and greater than 100.
To generate randomnumber read about randi. To check whether even or not use mod. Read about mod. To check whether greater or...

2 hours ago | 0

Answered
A year containing a date or not
Read about the function calendar. https://in.mathworks.com/help/matlab/ref/calendar.html Fromhere you can pick the required co...

3 hours ago | 0

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i have a variable in my workspace and i dont know its name directly
If you have variables in the workspace....to get the variable names use: S = whose ; names = {S.name} ; Use strcmp to find ...

5 hours ago | 0

Answered
How to plot fft outputs in frequency domain?
You read here....https://in.mathworks.com/help/matlab/ref/fft.html You have to generate the frequency values based on the sampl...

7 hours ago | 1

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Answered
How to generate one random integer
As you cannot fix infinity, decide a huge/large number ..say 10^5 and use: x = randi([-10^5 10^5],1)

7 hours ago | 0

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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...

1 day 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 ...

2 days 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);

2 days 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...

3 days ago | 0

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

3 days 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...

4 days ago | 0

Answered
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...

4 days 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 days ago | 0

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Answered
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 days 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...

5 days 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)' ;

6 days 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 days ago | 1

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

7 days 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)) ;

7 days 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...

7 days 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 days 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 ...

8 days 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...

8 days 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 days 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 days 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 days 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 days 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...

9 days ago | 1

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