How to represent digital signal?

How to represent digital signal i.e sequence of 0's and 1's in matlab. and how to plot it

Basically i am trying to represent a switch through a diagram or a plot.

kindly help..!!

Answer 1

[Wayne King]

how about just using stem()?

   sig = randi([0 1],20,1);
   stem(sig,'markerfacecolor',[0 0 1])

Answer 2

[Riaz Uddin]

L = 1024;

Periods = 4;

M = 128;

A = 1;

figure,plot( squareWave(L,M,Periods,A) )

function signal = squareWave(L,M,Periods,A)

signal = zeros(L,1); %initialize signal with zeros

if mod(L,Periods) ~= 0

signal = -1; % False input data

end

T = L/Periods; % Get length

% Replace only non-zero values

for idx=1:Periods

signal( 1+(idx-1)*T:1+(idx-1)*T+M) = A;

end

end