# KSSV

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

**Programming Languages:**

Python, MATLAB, Fortran

**Spoken Languages:**

English, Hindi, Telugu

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**Content Feed**

Vector plots by Quiver in MATLAB

[X,Y,Z] = peaks(100) ; [u,v] = gradient(Z) ; w = sqrt(u.^2+v.^2) ; pcolor(X,Y,w) ; shading interp ; colormap(jet); hol...

ungefär 16 timmar ago | 1

How can I avoid using for loop in this functions

function y=Besselj_approx(n,z) i = n ; y=zeros(1,length(n)); y(1:end)=-z.^2/4+1; y(i>0) = 1./gamma(i(i>0)+1).*(z/2).^i(i>0);...

ungefär 17 timmar ago | 0

How do I save a file in excel to matlab current folder?

T = readtable('myfile.xlsx') ; T

3 dagar ago | 0

Given x= rcos(𝛼) ; y=rsin(α); write MATLAB program to plot a circle of unit radius (r=1).

This is a simple homework... You should do it your self. Read about: Linspace for making angle between 0 to 360 i.e. 0 to 2*pi ...

3 dagar ago | 1

Plotting 3D by rotate 2D plot around y-axis

This might be useful. Checkout: https://in.mathworks.com/matlabcentral/communitycontests/contests/4/entries/4996

4 dagar ago | 0

Averaging data between two integer and corresponding column of a matrix

A = [1 2 3 4 5 6; 1.234 1.11 1.3 2.31 2.3 2.4]' ; idx = fix(A(:,2))==2 ; mean(A(idx,1))

6 dagar ago | 0

How to make a linear regression coefficient algorithm

x = 1:10 ; y = rand(1,10) ; [a,b] = linreg(x,y) ; % Check p = polyfit(x,y,1) ; [a b ; p(2) p(1)] function [alpha, b...

6 dagar ago | 0

How to create a custom colormap ("seismic" from python)

Refer this: https://in.mathworks.com/matlabcentral/fileexchange/45208-colorbrewer-attractive-and-distinctive-colormaps https:/...

6 dagar ago | 1

| accepted

what is the meaning of this error? how to stop this error?

You have copied this function named 'Forward_model' under a script/ code whose file name is also same as the function i.e. Forwa...

9 dagar ago | 0

Keeping same colors for the same groups in different group scatter plot

P = rand(1000,2) ; x = P(:,1) ; y = P(:,2) ; idx = kmeans(P,4) ; figure h = gscatter(x,y,idx) ; % Get colors C = resha...

10 dagar ago | 1

| accepted

Why doesn't it work ? Please help

dt = 0.01; t = 4; T = 0:dt:t; % First Quarter r1 = 0:dt:t/4 ; p1 = sin(pi.*r1) ; plot (r1,p1) % Define second Qua...

11 dagar ago | 0

matlab polyfit multiple sets of y data

Run a loop for each set..... Let y be your mxn data and x be your 1xn data. p = cell(m,1) ; for i = 1:m p{i} = polyfut...

11 dagar ago | 0

Can't run my 'if, elseif, else' code

score= randi(100); if score < 20 grade = 'D'; elseif score < 40 grade= 'C'; elseif score < 60 grade= '...

12 dagar ago | 0

| accepted

Not enough input arguments

f = @(x,y) x.*y + 10*sin(x).*cos(y); x = linspace(0,2*pi) ; y = linspace(0,2*pi) ; [X,Y] = meshgrid(x,y) ; Z = f(X,Y) ; su...

12 dagar ago | 1

can you help me to solve this equation?

syms x P = sqrt(27.8*exp(5*x)-1) == cos((120*x^2+sqrt(2*x))/(17*x-65))^(-1) ; s = vpasolve(P,x)

20 dagar ago | 0

Syntax problem with a user-defined function with sine

function r = my_function(thet) r = pi*(3-sin(theta)^5) ; end Save the above, it will be saved on he name my_function.m. ...

24 dagar ago | 0

Matrix multiplication gives different result than manual dot products with each column

As you are comparing floatting point number, you should not use isequal. You should proceed like shown below: N = 1000; B = 10...

25 dagar ago | 0

How to plot the streamlines and arrow surface in MATLAB from columns of data?

clc ; clear all ; % T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1311670/streamlines%20plot.txt...

25 dagar ago | 0

| accepted

trying to align multiple sin waves onto same graph with the period of the wave on the x axis.

Take same time array for all the waves. g = 9.807; T = 11; H = 4; d = 30; CD = 0.85; CM = 1.77; Rho = 1025; D = 1; u =...

26 dagar ago | 0

Double X-axis(t,p1) and single Y-axis(p2) depending on t

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1309930/b1.xlsx') ; t = duration(T.Time); p1 = T....

27 dagar ago | 0

How to apply the same style/color and axes labels to all subplots?

colors = ["k"; "r";"g";"r";"g"]; lines = ["-"; "-";"-";"--";"--"]; tiledlayout(2,2); ax(1) = nexttile ; plot(rand(10,1)...

27 dagar ago | 1

| accepted

How to get the decimal values using solve in MATLAB

Read about vpasolve, double.

28 dagar ago | 1

How do I repeat the comand for another line

dt = dx1./v; % let dt be 10x1 array m = length(dt) ; n = 60001 ; temp0 = zeros(m,n) ; for i = 1:n tempo(:,i) = 0:dt...

28 dagar ago | 0

| accepted

Create a point with a number inside

th = linspace(0,2*pi) ; x = cos(th) ; y = sin(th) ; % Make numbers idx = 1:5:length(th) ; figure hold on plot(x,y,'k',...

ungefär en månad ago | 0

Pulling Vectors From 3D Matrix Based on Indicies

A = rand(30,40,10) ; iwant = squeeze(A(13,33,:))

ungefär en månad ago | 1

How to have two legends on the same plot?

figure hold on plot(rand(1,10),'r') plot(rand(1,10),'b') legend('One','Two')

ungefär en månad ago | 1

Please help, I keep getting this error... Error using plot Not enough input arguments.

Months=["Jan";"Feb";"March";"April";"May";"June";"July";"Aug";"Sept";"Oct";"Nov";"Dec"]; EnergyDailyAve = [33.677 76.714 69.6...

ungefär en månad ago | 0

Calculate area under peak

Read about the functions polyarea, trapz. Provde the (x,y) data of the curve for which you want to calculate the area.

ungefär en månad ago | 0