; This batch file creates a simulated signals used in the examples
; in Chapter 13, "Signal Processing", of _Using IDL_.

N = 1024                      ; number of time samples in data set
delt = 0.02                   ; sampling interval in seconds

U = -0.3 $                                    ;  DC component
   + 1.0 * Sin(2*!Pi* 2.8 *delt*FIndGen(N)) $ ;  2.8  c/s component
   + 1.0 * Sin(2*!Pi* 6.25*delt*FIndGen(N)) $ ;  6.25 c/s component
   + 1.0 * Sin(2*!Pi*11.0 *delt*FIndGen(N))   ; 11.0  c/s component