Matrix Dimension must agree..

i want to perform product of msg n carrier to obtain ook modulated signal bt m getting error while doing product

 samples=1000;
 nos=4;
%generate carrier signal 
 cfreq=[30 40 60 100]; 
 t=linspace(0,1000,samples);
 parfor i=1:nos
    x(i,:)=sin(2*pi*cfreq(1,i)*t);
 end
%input msg signal
 for i=1:nos
    p(i,:)=input('enter sequence');
    l(i,:)=length(p(i,:));
 end
%modulation
 for i=1:nos
       y(i,:)=x(i,:).*p(i,:);  % *error:* matix dimension must agree
 end

Answer 1

[Roger Stafford]

The error message is telling you what the trouble is. The vector x(i,:) has 1000 elements for each 'i', but p(i,:) was input and clearly the user would not have the patience to enter 1000 values. Yet the element-wise multiplication x(i,:).*p(i,:) requires that they be of the same size. You had better rethink what you are doing.