How to get an approximately value with number data with specified polynomial in MatLab? - polyfit -- MatLab

How to get an apprixmate value with number data with specified polynomial in MatLab?

[Ans]

polyfit

It will return approximately value with x-axis data <x> and y-axis data <y> which is represented with degree n of the polynomial.

<p>

coefficient of polynomial

<S>

structure of polynomial

<mu>

population of mean in distribution

more details about mu (one of Greek Letters) on:

more details on:

clear

clc

x = linspace(0,4*pi,10);

y = sin(x);

p = polyfit(x,y,7)

%{

p =

   -0.0001    0.0028   -0.0464    0.3702   -1.3808    1.9084   -0.1141    0.0002

%}

x1 = linspace(0,4*pi);

y1 = polyval(p,x1);

figure

plot(x,y,'o')

hold on

plot(x1,y1)

hold off

coefficient polynomial

                                figure