Linear Regression Model (Data points inserted using mouse pointer) | MATLAB

Prerequisite:

Linear Regression in MATLAB (Least Square Regression) | Part 1

clc

clear all

close all

a=input('Enter , how many times you want to run the same code:');

x=[];

y=[];

h=0;

for i=1:a

    axis([-10 10 -10 10]);

    [m,n]=ginput(1);

    x=[x m];

    y=[y n];

    plot(x,y,'o');

    if(length(x)>2)

    delete(h);

    end

    axis([-10 10 -10 10]);

    if(length(x)>1)

    a=[];

for i=1:length(x)

    a=[a ; x(i) 1];

end

 c =a\y';

yR = c(1)*x + c(2); % the fitted line

hold on;

h=plot(x,yR,'k','linewidth',3);

axis([-10 10 -10 10]);

    end

end