Sine function.
Number: 4
Names: xc, w, A, y0
Meanings: xc = phase shift, w = period, A = amplitude, y0 = offset.
Lower Bounds: w > 0
Upper Bounds: none
nlf_sine(x,xc,w,A,y0)
FITFUNC\SINE.FDF
Origin Basic Functions, Waveform, PFW