Undefined function 'fmmod' for input arguments of type 'double'.

Hi I am getting error when typing such code for multiplexing on matlab. The line on which error is encountered is :-

parfor i=1:nos
    y(i,:)=fmmod(m(i,:),cfreq(1,i),10*cfreq(1,i),freqdev); 
end

Requested to suggest solution to the above problem

[Dana]

Do you have the Communications Toolbox installed? If not, you don't have the function fmmod.

[Raymond Norris]

Ankit please post the error MATLAB is throwing. And do you get the same error when you run this as a for loop?