%% Example 1.2 Quantizing a Digital Signal
%% Creating a 4 row random column vector

format long
y = rand(4,1)
%% 
% This vector has components between 0 and 1. The command *format long* 
% makes MATLAB display more digits. 
% 
% 
%% Converting it to an integer between 0 and 256
% I'll do eight bit quantization. Since $2^8=256$ I want to turn each component 
% of y into an integer between 0 and 256. To do this, I multiply y by 256, then 
% replace each component by the greatest integer less than or equal to it.

y1 = 256*y
%% 
% Then I apply the *floor* command to produce the integer.

z = floor(y1)
%% 
% Finally, I want to convert to a binary vector. The command *dec2bin* does 
% that.

dec2bin(z)