Generation of Harmonics using matlab

sir,

A mat lab implementation is to be done for the below problem. Problem: A supply voltage of 5V varies HARMONICALLY around a nominal value of -0.5v to +0.5v (i.e., it varies between 4.5v to 5.5v in a harmonic manner). The number of harmonics depends on the number of simulations(n) (i.e., 1 harmonic value= 1 simulation). so harmonic values of voltage is need to be generated/implemented using mat lab commands.

for example: Assuming number of simulations(n)=1000, 1000 harmonic values of voltage between 4.5v to 5.5v need to be generated.

Does mat lab has any built in function to generate HARMONICS numbers between any two values( like rand function)?

please can you help me to develop this logic using mat lab.