calculate the exponential time of the curve. This is done by fitting a spline, and calculating when the first derivative goes below 0.

Source: R/analyse.R

calculate the exponential time of the curve. This is done by fitting a spline, and calculating when the first derivative goes below 0.

calc.exp.time(df = NULL, input_time = "time", input_value = "value",
  treshold = 0.3, lambda = 1e-05)

Arguments

df

(dataframe). Dataframe containing the data
input_time

(string). Column name that contains the time value (in hours!). (Default = "time")
input_value

(string). Column name that contains the measured value. (Default = "value")
treshold

(double). End of exponential time is only calculated if this treshold has been surpassed. This mainly filters out the noise often seen in the beginnen of the curce.
lamda

(double), Smoothing paraneter. this needed to filter out outliers.

Value

double. End of the exponential phase