ExpDecay1-FitFunc
One-phase exponential decay function with time offset, x0 should be fixed.
Number: 4
Names: y0, x0, A1, t1
Meanings: y0 = offset, x0 = center, A1 = amplitude, t1 = time constant
Lower Bounds: none
Upper Bounds: none
nlf_expdecay1(x,y0,x0,A1,t1)
FITFUNC\EXPDECY1.FDF
Exponential