KSSV

Last seen: Today

7,392 total contributions since 2011

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

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Answered
How do I turn of thr grid of a surface but keep the edge line on?
[X,Y] = meshgrid(1:10) ; Z = sqrt(X.^2+Y.^2) ; % plot the outer line X1 = X ; X1(2:end-1,2:end-1) = NaN ; Y1 = Y ; Y1(...

19 hours ago | 0

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Answered
Just want to learn how to better
Read about imread, imshow, title.

21 hours ago | 0

Answered
How do I subplot multiple tiles that I divided from a satellite image in one figure?
count = 0 ; for m=1:16 for n=1:16 count = count+1 ; subplot(16,16,count); imshow(tiles{m,n}); ...

21 hours ago | 1

Answered
Changing the color of a 3D plot
This command: h = plot( fitresult); You specify a marker/ different color for both the functions. h = plot( fitresult,'b'); ...

21 hours ago | 0

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Select points inside a polygon
You can use the previous questions answer..with a slight change while saving the points. clc; clear all ; load("polygon1_x.ma...

21 hours ago | 1

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Velocity potential with quiver command
You should use gradient. [u,v] = gradient(StreamFunction) ; quiver(x,y,u,v)

22 hours ago | 0

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Plot a box around set of points
This question can be solved from your previous question which was answered. If (x,y) is your point and you want points around ...

22 hours ago | 1

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how can i plot positive magnitude only of a sine wave
% get the index of only positive values idx = DC_Voltage>=0 ; plot(DC_Voltage(idx))

23 hours ago | 1

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i was writing a equation but this always have an error and i cant run it
You should first define the constants and then type the formula. T= 1000; L=10; W=100; S=100000; %% this is tha value of ...

23 hours ago | 1

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Answered
Create a box around points and use in inpolygon
load("polygon1_x.mat") ; load("polygon1_y.mat") ; load("lon.mat") ; load("lat.mat") ; % remove Nan's from the data xv ...

1 day ago | 1

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Answered
How to use ginput to determine the coordinates of an image
You have dimensions of each image...say dimensions of each image [m,n,3]. Initiate a matrix idx such that, each quarter has the ...

2 days ago | 0

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how can i write the code out for this 1-1/2+1/3-1/4+1/5-,.....
It is your Home work..you have to do it. Do the following. Read about for loop. Fix the value of n, to run a loop. You can...

3 days ago | 0

Answered
How to find the exact index(row, col) of a maximum value in a matrix?
Let I be your image. [m,n,p] = size(I) ; x = 1:n ; y = 1:m ; [X,Y] = meshgrid(x,y) ; [val,idx] = max(I(:)) ; imshow(I...

4 days ago | 0

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Answered
strength of materials in matlab
P = [0 0] ; L = 1000 ; % length of beam B = 0.5 ; % breadth of beam B = [P ; L P(2) ; L B ; P(1) B] ; patch(B(:...

4 days ago | 0

Answered
How to make a contour plot with data from using ode45
X= linspace(1,5,5); % Vector for alpha_p values Y= linspace(0.5,3,5); % Vector for beta_p values [A, B]= meshgrid(X,Y); nt ...

4 days ago | 0

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Find the general solution of the equation y ′ − y = y 2 e x .
syms y(x) ode = diff(y,x)-y==y^2*exp(x) ; sol = dsolve(ode)

6 days ago | 0

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Let A and B be square matrices of same order. Prove that characteristic polynomials of AB and BA are same. Do AB and BA have same minimal polynomial ?
Calculate the eigenvalues of the product. They will be euqal. A = rand(2) ; B = rand(2) ; AB = eig(A*B) BA = eig(B*A)

6 days ago | 0

Answered
if(0.41 == (41*0.01)) is False and if(0.42 == (42*0.01)) is True .. Why?
Read about comparing floating-point numbers. tol = 10^-5 ; if(abs(0.41-(41*0.01)<=tol)) %First Condition disp('tr...

6 days ago | 0

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Answered
Error: Brace indexing is not supported for variables of this type.
datevec = cell2mat(datenum); Or check class(datenum) It should be already a converted to double.

6 days ago | 0

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Answered
Sum of two numbers is not accepted
Read about comparing two floating-point numbers. a=0.14+0.001; tol = 10^-5 ; idx = abs(M(:,2)-a)<=tol ; M(idx,:)=[];

6 days ago | 0

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Answered
How to remove the grid from plot
x = linspace(0,10); [X,Y] = meshgrid(x,x); z = X.*Y; pcolor(x,x,z); shading interp

6 days ago | 1

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Answered
Matrix dimensions must agree error
Ws=2*pi*60; tetha=0; t=0:0.0001:0.1; v1=linspace(1,30,length(t)); % it can be v1=1:1:30 N=45; I=10; p=2; K =(2*N*I)/(pi*...

6 days ago | 0

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Answered
How can I plot a unit vector in 3-D space?
You need not to use that complex, time consuming loop to get what you want. clear all close all clc N=101; x=linspace(-10,...

6 days ago | 0

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Answered
Index exceeds array bounds
x=[1:11] x(11)

6 days ago | 0

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Answered
mean over over multiple dimensions and multiple arrays
% make dummy data N = 8 ; for i = 1:N C{i} = rand(2,2,3) ; end % get the mean N = length(C) ; [m,n,p] = size(C{1})...

6 days ago | 1

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Answered
How to extract a 1D dose at certain depth in x,y or z-direction from a 3D array?
I feel slice is your function.... load("xdim.mat") ; load("ydim.mat") ; load("zdim.mat") ; load("3d_dose data.mat") ; ...

6 days ago | 0

Answered
Sum of elements in cell array
Better use loop to avoid confusion using cellfun. Note cellfun also use loop inside. clc; clear all ; load("numerical.mat"); ...

6 days ago | 0

Answered
3D plot on 3D matrix
You can use pcolor/ surf. You can plot w.r.t indices. val = rand(10,5,2) ; % using pcolor subplot(211) pcolor(val(:,:,1))...

7 days ago | 0

Answered
How to find the point at which a line becomes perpendicular to another line?
x = [150 0] y = [0 150] C = [0 0] ; % get the line ax+by+c = 0 slope = diff(y)/diff(x) ; % slope a = slope ; b = -1...

7 days ago | 0

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Answered
Inserting a row in a matrix in a precise place
A = [ 2 8 3 11 ; 13 33 4 5 ; 18 8 4 7 ; 23 4 6 11 ] ; b = [ 8 4 23 9 ] ; idx = find(A(:,1)<b(1))+1 ; % get the positon whe...

7 days ago | 0