How do I create a toeplitz matrix from a signal and with that create a polynomial and get its constants

clear variables; % Limpia variables

close all; % Cierra ventana

clc; % Limpia

t = 0:0.01:1; % Vector de tiempo

Fs = 180; % Frecuencia de muestreo

fs = 1/Fs; % Periodo de muestreo

L = 100; % Muestras

t1 = (0:L-1).*fs; % Vector de tiempo

A = 2; % Amplitud

pha = 0; % Fase

T = 1; % Periodo

f = 1/T; % Frecuencia

x = A*sin(2*pi*f*t+pha); % Señal senoidal

Hello everyone, could someone help me how to create a toeplitz matrix from this sinusoidal signal. I know there is a function already, but what happens I am programming it without using the function that Matlab has