calculate_halflife function

Calculate the halflife of data

Determines the terminal halflife of a sequence of corresponding times and values with optional minimum and maximum times to censor data.

calculate_halflife(times = NULL, values = NULL, tmin = NULL, tmax = NULL)

Arguments

• times: - sequence of times
• values: - corresponding sequence of values
• tmin: - minimum time to include (NULL)
• tmax: - maximum time to include (NULL)

Returns

List with the following names

• thalf Halflife in units of times above
• mod Result of lm used to fit the log transformed data
• df Dataframe with the data and predicted values at the time within tmin and tmax

Examples

x     = c(0:100)
y     = exp(-.1*x)
th    = calculate_halflife(times=x, values=y)
thalf = th$thalf