Generation of PSK using MATLAB!!!

Code for generating PSK signal using MATLAB!!!

x=input('input binary message sequence');
N=length(x);
x(x==0)=-1;
t=0.001:0.001:N;
for i=1:1:N;
   m((i-1)*1000+1:i*1000)=x(i);
end
c1=2*sin(2*pi*5*t);
 y=m.*c1;
 subplot(3,1,1);
 plot(t,m);
 xlabel('Time');
 ylabel('Amplitude');
 Title('Bit sequence');
 subplot(3,1,2);
 plot(t,c1);
 xlabel('Time');
 ylabel('Amplitude');
 Title('Carrier');
 subplot(3,1,3);
 plot(t,y);
 xlabel('Time');
 ylabel('Amplitude');
 Title('PSK signal');

Output:Input sequence [1 1 0 1 0 1 1 0]