Calculation of exponential curve for skims

The following equation is used to calculate an exponential, new exponential, or gaussian skim:

H_b(t_R) = H₀ * exp (- B * (t_R - t₀)) + A * t_R + C

where

Hb	Height of the exponential skim at time t_R
H₀	Height (above baseline) of the start of the skim (different estimates for exponential and gaussian skim)
B	Decay factor (different estimates for exponential and gaussian skim)
t₀	Time corresponding to the start of the skim (different estimates for exponential and gaussian skim)
t_R	Retention time
A	Slope of the baseline of the parent peak
C	Offset of the baseline of the parent peak (different estimates for exponential and gaussian skim)

Figure Values used to calculate an exponential skim