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KSSV


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7,427 total contributions since 2011

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

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Answered
How to import data from .txt file?
data = importdata(mytextfile) ;

4 hours ago | 0

Answered
ASSIGN COMPLEX NUMBERS(X+jY) RANDOM INTEGERS BETWEEN 1 and 3
N = 5 ; C = zeros(N,1) ; for i = 1:N C(i) = randperm(3,1)+1i*randperm(3,1) ; end

4 hours ago | 0

Answered
Why subplots doesn't work?
subplot(2,2,1) plot(a) subplot(2,2,2) plot(b) subplot(2,2,3) plot(a2) subplot(2,2,4) plot(b2) Note that figure will open...

5 hours ago | 0

Answered
How to load multiple .mat files into two different groups
USe this file exchange: https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort First nine will ...

6 hours ago | 0

Answered
Error with surf function
[m,n] = size(data) ; x = 1:n ; y = 1:m ; surf(x,y,data) Also you can straight away use: surf(data) ;

8 hours ago | 1

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Answered
Plotting after a for loop
x = -5:5 ; y = zeros(size(x)) ; y(x>=0.5) = 0.5 ; plot(x,y)

8 hours ago | 0

Answered
how to put only one element randomly in row of matrix
A = zeros(4,3) ; [m,n] = size(A) ; for i = 1:m idx = randperm(n,1) ; A(i,idx) = 1 ; end

10 hours ago | 0

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Answered
How can you clear the content of a workspace in the MATLAB environnement
There are multiple errors possible in MATLAB. Refer here: https://en.wikibooks.org/wiki/MATLAB_Programming/Error_Messages

13 hours ago | 0

Answered
I want to divide color image in small tiles and then need to count number of color pixels in each tile.
Refer this to split the matrix/ image into blocks https://www.mathworks.com/matlabcentral/answers/362262-i-have-a-32-32-matrix...

15 hours ago | 0

Answered
hi i want to save images
for i = 1:44 h=figure ; plot(rand(1,10)) ; saveas(h,sprintf('FIG%d.png',i)); % will create FIG1, FIG2,... end

1 day ago | 0

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Answered
How can I create a small cell 500*500 pixel in one satellite image?
Refer this....it should help you: https://www.mathworks.com/matlabcentral/answers/362262-i-have-a-32-32-matrix-i-want-to-take-m...

1 day ago | 0

Answered
How to use matlab to calculate this sum?
With loop N = 1000 ; thesum = 0 ; for i = 1:N thesum = thesum +(1/i+1/((i+2)*(i+3))) ; end Without loop N = 1000 ; ...

1 day ago | 0

Answered
how to specify the particular column numbers of a matrix in for loop
for i = 1:1801 for j = 70:75

1 day ago | 0

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Answered
How do I call to function from other function?
You need to save both the function files in the same folder and yes call the other function in the required function. It is very...

2 days ago | 1

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Answered
How to set different marker for some different values?
fmt = {'*','o','^','.','+','x','s','p','h'}; % different markers x = 1:9 ; y = rand(size(x)) ; figure hold on for i = 1:...

2 days ago | 0

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Answered
Sum the values of one column based on another column in Table
Let T be your table. R = T.Range ; val = 862.33 ; count = nnz(abs(R-val)<=10^-5)

2 days ago | 0

Answered
Recover matrix Z from XZX', Z es symmetric and n-by-n, while X is k-by-n where n>>k
Does this match your criteria? k = 8 ; n = 5 ; % create dummy data X = rand(n,k) ; Z = rand(n) ; Z = Z+Z' ; % make ...

3 days ago | 0

Answered
How to find the power of a matrix?
A=A/10^5 ; A = A.^2 ;

3 days ago | 0

Answered
How to find convolution of three functions.
Read about conv2. s1 = conv2(conv2(f1,f2),f3) s2 = conv2(conv2(f2,f3),f1) s3 = conv2(conv2(f1,f3),f2) All the abve three a...

3 days ago | 0

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Answered
Error using sym/subsindex
Initialize the cell first. Q =cell(length(a),length(ttt)) ; % initialize USe this in the loop. Q{i,j} = %% your formul...

4 days ago | 0

Answered
How to cut area or some part of image ?
How about using this? https://www.mathworks.com/help/images/ref/imfreehand.html

4 days ago | 0

Answered
How to avoid patch color being included in legend ?
clc; clear all; close all; x = linspace(-10,10,200); y = sin(4*x); y1 = sin(x); figure; hold on patch([2 5 5 2], [[1 1]...

4 days ago | 1

Answered
Change resolution of .xyz file in matlab
You need to interpolate your data. Read about interp2. Also if you have Z data, you can use imresize. Read about this as well....

5 days ago | 0

Answered
Create stl. file with [F,V,N] data
USe this: https://www.mathworks.com/help/matlab/ref/stlwrite.html#d120e1182467

5 days ago | 0

Answered
Index exceeds the number of arrays
Try to clear the variables, before using your code. There is no error in your code. It should work. clc; clear all; A = 4; W...

5 days ago | 0

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Answered
Adding Number using for loop
Let A be your n*2 array. t = A(:,1) ; s = A(:,2) ; [C,ia,ib] = unique(t) ; N = length(C) ; iwant = zeros(N,1) ; for ...

5 days ago | 0

Answered
peak Value of a spike in graph at a particular time
You reshape your array and use min and max. Read about reshape, min, max.

5 days ago | 0

Answered
dynamic allocation of arrays
You can initiate it to a cell. resultPolygon = cell(720,1); for i = 1:720 newShaper = homogeneousTransformMatrix(phi(i))...

5 days ago | 0

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Answered
How can I save multiple matrix and index them?
txtFiles = dir("*.txt") ; N = length(txtFiles) ; themax = zeros(N,1) ; % loop for each file for i = 1:N data = import...

5 days ago | 0

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Answered
Crop out a section of the image in imshow, how?
Read about imcrop. Let I be your image. rect = [234 355 (1678-234) (764-355)] iwant = imcrop(I,rect) imshow(iwant)

5 days ago | 0

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