Built-in data fitting feature in MATLAB (lsline & basic fitting in figure menu)

Prerequisite:
Multiple Linear Regression | MATLAB Machine Learning using MATLAB: https://www.matlabcoding.com/2020/04/standard-deviation-in-matlab-without.html lsline Documentation: https://in.mathworks.com/help/stats/lsline.html

Code:

%Regression analysis on the grade, the IQ, and the number of hours studied per week by 13 students

clc

clear all

close all

format longG

%Grade

y=[1 1.6 1.2 2.1 2.6 1.8 2.6 2 3.2 2.6 3 3.6 1.9];

%IQ

x1=[110 112 118 119 122 125 127 130 132 134 136 138 125];

%Study Time

x2=[8 10 6 13 14 6 13 12 13 11 12 18 7];

n=length(x1);

a=[ones(n,1) x1' x2'];

c=pinv(a)*y';