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KSSV


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8,139 total contributions since 2011

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

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Answered
Error message saying "Matrix dimensions must agree"
"Matrix dimensions must agree". not too sure why this is. The error is pretty simple. You will get this error, when you try to...

6 hours ago | 0

Answered
Create matrix with two matrices
A = [1 2 3; 4 5 6;7 8 9] B = [ 11 12 13;14 15 16;17 18 19] m = size(A,1)+size(B,2) ; C = zeros(m,3) ; C(1:2:end,:) = A ; ...

11 hours ago | 1

Answered
Plotting the given Trigonometric functions
x = linspace(-pi,+pi); y = x ; [X,Y] = meshgrid(x,y) ; Z = Y.*sin(2*X)-X.*cos(2*Y) ; surf(X,Y,Z) colorbar

12 hours ago | 1

Answered
How to to take a value positive of equation
sol = double(x2) ; sol(sign(sol)==1)

12 hours ago | 1

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Answered
Split a data in random partitions
A = rand(100,2) ; n = size(A,1) ; % Get 70% of data random from A m = round(0.7*n) ; % Randomize the data idx = rand...

13 hours ago | 0

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Answered
How to solve an equation
syms x fOut=1/3 m=1 s=1 eqn = fOut -(exp(-0.5*((m-x)/s)^2)/(s*(2*pi)^0.5))== 0 ; s = solve(eqn,x)

14 hours ago | 0

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Answered
extracting the index of an irregular line on a 2D matrix
Read about ismember. A = rand(10) ; B = A(randperm(100,10)) ; [c,ia] = ismember(A(:),B) ; A(c)

16 hours ago | 0

Answered
All possible combinations of a number of an array
Use this file exchange: https://in.mathworks.com/matlabcentral/fileexchange/69507-npermutek v = 1:3 ; iwant = npermute(v,3)...

19 hours ago | 0

Answered
How to use the method in this article I uploaded to write a program to fit a closed curve?
Attaching an article and uploading your data, you expect us to write a progrma for you? You can have a look on the below toolb...

19 hours ago | 0

Answered
MATLAB cannot integrate trigonometry in the form of degree
Note that at the end, your answer will be in degrees....you can convert it to raidians and check. syms x f = cosd(x); % x is ...

1 day ago | 1

Answered
Operands on table, comparison with numbers
You have to access the columns of Table T using T.(1), T.(2) etc, Read about accessing the columns from tatble. If you have na...

1 day ago | 1

Answered
how to plot tangent of y=x^(1/2) at a point x=4 on MATLAB?
It is a MATHS question. You should know the steps of how to follow. Refer it here: https://intl.siyavula.com/read/maths/grade-...

1 day ago | 0

Answered
Extracting certain rows from matrix
Read about ismember.

1 day ago | 0

Answered
How to call n numbers from a Matrix
watlevel=[1.8; 1.5; 1.2; 1.3; 1.4; 1.6; 1.7; 1.4; 1.1; 0.9; 0.2; 0.2]; %incoming water level time=[0; 3; 6; 9; 12; 15; 18; 2...

1 day ago | 1

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Answered
How to know which plot is more linear then the other?
How about finding the area bounded by the curves..which ever has least area is straight. A = [0 0.423891532 0.819380304 1.2...

1 day ago | 0

Answered
Matrix "User Define"
What you gave is a combination of numbers and strings.....this cannot be acieved by a matrix. But you can use cell arrays for th...

2 days ago | 0

Answered
Solve the equation for x
Repalce exp.^() with smply: exp() Also element by element operation not reuqired: fun = p* exp(-exp((v-x)/a)) + r* exp(-((...

2 days ago | 2

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Answered
How to get X and Y coordinates from a Sparse Matrix?
If A is your sparse matrices. You can get positions using: [y,x] = find(A) ; % x, y are the positons/indices of non-zeros ...

2 days ago | 0

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Answered
Index exceeds the number of array elements (1).
The error is clear...you are trying to extract more number of elements than present int he array. A = rand(1,10) ; A(1) %...

3 days ago | 0

Answered
Plot exactly root of polynomial degree=3
p = [1 -1 0 -10] ; % polynomial coefficients r = roots(p) ; % get roots %% plot x = linspace(0,10); y = polyval(p...

3 days ago | 0

Answered
How to vectorize matrix assignment process below
Read about sub2ind. Convert your sub indices into global indices and use. idx = sub2ind(size(A),2*i-1,2*i-1) ; A(idx) = a(i) ...

3 days ago | 1

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Answered
How to calculate the value of the vector A in equation AXA' = b?
syms x y A = [x y] ; X = rand(2) ; b = rand ; eqn1 = A*X*X'- b ==0 s = solve(eqn1,x,y) ; x = double(s.x) y = double...

3 days ago | 0

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Answered
Generating 2D Geometry with MATLAB and Exporting to FEM software
Yes it is very much possible.. but you need to enter the details of FEA/ FEM mesh in the format which software demands. Already ...

3 days ago | 0

Answered
need help with writing a script that will solve the problem here is what i started with
Hints: x = linspace(0,1,100); y = linspace(0,1,100) ; [X,Y] = meshgrid(x,y) ; Z = X.^2+Y.^2 ; surf(X,Y,Z) shading interp ...

3 days ago | 1

Answered
How can I read multiple mat files and perform ttest2 function?
This question has been discussed to death. A simple search will give you lot of links. matFiles = dir('*.mat') ; N = length(...

3 days ago | 0

Answered
how do i write a matlab script to sum this expression?
N = 100; thesum = 0 ; for i = 1:N thesum = thesum+(1/i+1/((i+2)*(i+3))) ; end Without Loop: N = 100 ; f = @(i) (1....

4 days ago | 1

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Answered
how to find argmin to this vector
Are you looking for something like this? Let a,b be your column matrices. [a,b] = meshgrid(a,b) ; % make them a matrix F ...

4 days ago | 0

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Answered
How to Swap Column according to odd/even numbers?
This is basic in MATLAB. You should read about indexing an array. Example: A = rand(10,1) ; % array for demo E = A(2:2:end...

4 days ago | 0

Answered
How to get the Z-contour values related to scatter positions?
Read about ScatteredInterpolant.

4 days ago | 0

Answered
Given that a=[1;4.2;3;pi;8;7;62;50;23;17]; Please use vector b to represent all the even elements in vector a (b=[8;62;50])?
Use mod to get your even numbers. a = [1; 4.2; 3; pi; 8; 7; 62; 50; 23; 17]; idx = mod(a,2) ; iwant = a(idx==0)

4 days ago | 0

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