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KSSV


INCOIS

6,003 total contributions since 2011

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

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Answered
gradient issue for matlab
Let A be your 47X2 matrix. q = A(:,1) ; v = A(:,2) ; dq_dv = diff(q)./diff(v) ; % dq/dv dv_dq = diff(v)./diff(q) ; ...

1 day ago | 0

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Answered
m_coast not working in m_map
Change finite to isfinite

1 day ago | 0

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Answered
Varying value of stiffness
You may refer this: https://in.mathworks.com/matlabcentral/fileexchange/34381-mathieu-equation-parametric-oscillator

1 day ago | 0

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Answered
Check common elements in two vectors and remove them from both the vectors leaving any duplicate. (Example Inside)
A = [1 2 3 4 4 4 5 5 6] B = [2 4 5 5 9 ] new_A = setdiff(A,B) new_B = setdiff(B,A)

1 day ago | 0

Answered
Calculate minimum distance between points in a mesh
A = rand(20, 2); x = A(:, 1); % x coordinates y = A(:, 2); % y coordinates d = pdist2(A,A) ; % Get minimum distance d(d=...

1 day ago | 0

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Answered
How to rectify this error,
Don't run the function usinf run/ F5. Give inputs and call it. Theta = pi ; age = 30. ; chol = rand ; [J,grad] = compu...

1 day ago | 0

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Answered
Unknown variable with str2num ?
Read about str2num. It takes string as input and conerts it to number. If the input is not string it will throw error like in yo...

1 day ago | 0

Answered
how to split channels of a video
If you have a RGB frame F os size m*n*3... R = F(:,:,1) ; G = F(:,:,2) ; B = F(:,:,3) ;

1 day ago | 0

Answered
Error using imread The file name or URL argument must be a string. Error in imread Error in image_block (line 29) currentfilename = imread(imagefiles);
imagefiles= dir('*.png'); for i=1:NFR currentfilename = imagefiles(i).name; I = imread(currentfilename); % Do what you want ...

1 day ago | 0

Answered
how to change color space of any video
vidObj = VideoReader('C:\Users\Public\Videos\Sample Videos\Wildlife.wmv'); % video file %% Read the video frame by frame nu...

1 day ago | 0

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Answered
How do I read a block of data from excel sheet and store it in an array?
YOu may proceed like this: clc ; clear all ; T = readtable('plot.xlsx') ; N = length(unique(T.(1))) ; % loop for each fli...

1 day ago | 0

Answered
Getting Error: Data must be numeric, datetime, duration or an array convertible to double.
YOu see t is double and y is of class sym. y has variable tau YOu have two options. Convert y into double by substituting pos...

1 day ago | 0

Answered
how to generate random points located on the surface of a hemisphere with its center at (2, 1, 3) and a radius of 6?
Use spherical coordinates,,,pick angles randomly and then convert into cartesian coordinates. Try this: N=500; r = 6; center...

2 days ago | 1

Answered
find index of points in meshgrid under the line
Read about knnsearch. You will get the the required/ nearest indices for the given line from the grid.

2 days ago | 0

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How to get data every second from table that has variable sampling time
Read about interp1. time = [ 0 0.0010 0.0021 0.0031 0.0041 0.0053 ] ; torque = [ 0 1.22 1.32 1.32 1.42 1.60] ; dt = 0.0...

2 days ago | 0

Answered
matlab preallocation problem in for loop
fluid_HX = cell(length(t),1); for j=1:length(t) fluid_HX{j}=refprop(v(j),T_in(j),r410a); end

2 days ago | 0

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Answered
Extract column from table
Area = rand(7,1) ; BoundingBox = rand(7,4) ; T = table(Area,BoundingBox) ; iwant = T.(2)(:,2)

2 days ago | 1

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Answered
SVM classifier contour plot
Read about inpolygon. On knowing the corodinates of contour...you can seperate inside and outside points.

2 days ago | 0

Answered
How do i code this question?
Loop is not required. format long g n=(10:20)' ; c = factorial(2*n)./((factorial(n+1)).*factorial(n)); idx = mod(n,2)==0 ...

2 days ago | 0

Answered
odd and even index in cell
A={[113],[112],[42],[29],[113],[69],[86],[9],[0]}; B={[18],[14],[5],[39],[27],[11],[9],[7],[0]}; A(2:2:end) = {0} ; B(1:2:e...

2 days ago | 0

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Answered
Why is it wrong: e3=sym('sin(x)^2+cos(x)=0')
syms x e3 = sin(x)^2+cos(x)==0

3 days ago | 0

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how to plot this ?
angle=linspace(0,2*pi,360)'; C = [0 0] ; R = 1 ; x=C(1)+R*cos(angle); y=C(2)+R*sin(angle); % x1 = R/2*cos(angle) ; ...

3 days ago | 1

Answered
Unable to find correct 2*theta by simple expression like 2*theta = atan (2 * A(1,2)/A(1,1) - A(2,2))
I think you messed up with a bracket......The expression shoul dbe: A = [1 2 ; 2 4] ; theta = atan (2 * A(1,2)/(A(1,1) - A(2...

3 days ago | 0

Answered
interpolation of 3d data
data = importdata('slice1_grid1.txt') ; x = data(:,1) ; y = data(:,2) ; z = data(:,3) ; %% Make grid m = 5000 ; n = 5...

7 days ago | 1

Answered
Plot function over two intervals
m = 500 ; x = linspace(-1,3,m) ; f = zeros(size(x)) ; f(x>=-1 & x <=0) = 1 ; f(x>=0 & x <2) = -1 ; plot(x,f)

7 days ago | 0

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Answered
Merging multiple csv files into one mat file
csvfiles = dir('*.csv') ; N = length(csvfiles) ; A = cell(N,1) ; for i = 1:N A{i} = csvread(csvfiles(i).name) end

7 days ago | 0

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Answered
how do i adjust the alignment of the columns?
I would suggest this: a = [1 0.74 0.56 0.66]; b = (1:25)'; c = b * a; T = table(c(:,1),c(:,2),c(:,3),c(:,4),'VariableNames...

7 days ago | 0

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How to retrieve pixel coordinates from sentinel lat/lon arrays for a given location?
Read about scatteredInterpolant if you want to do by intpolation......Read about knnsearch if you want a neasrest value.

7 days ago | 0

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Deleting data from a graphics
x = rand(10,1) ; y = rand(10,1) ; figure hold on for i = 1:10 h = plot(x(i),y(i),'.r') ; end title('delete some ...

7 days ago | 0

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Answered
How to compare each element of matrix having binary numbers?
idx = a ==b

7 days ago | 0

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