Moving average of the supplied imat_fn.
g=movavg(f,10)
g=movavg(f,10,'silent')
g=movavg(F,NPTS)
MOVAVG performs a moving average on the supplied imat_fn. NPTS is an optional input argument specifying how many points to use in the moving average. If it is not supplied, it uses 1/100 of the number of points of the first function in F.
The optional input string 'silent' suppresses any output as well as the progress bar.