Estimate growth rates

Usage

growth_rate(x, ...)

# S3 method for default
growth_rate(x, ...)

# S3 method for data.frame
growth_rate(x, n, time, by = NULL, ...)

Arguments

x: Numeric vector containing counts or related metric to estimate growth rates. It can also be a data frame containing n and time variables (for data frames only).
...: Further arguments passed to other methods.
n: Variable name of count data. Quoted or unquoted.
time: Variable name of the date variable (any format that is sortable). Quoted or unquoted.
by: Grouping variable

Value

When input value is a vector, then a vector of the same length that input parameter is returned. When input value is a data.frame, tibble or data.table, a data.table is returned.

Details

More info about this growth rate equation can be seen next ...

Note

For growth rate estimation, the data is assumed to be sorted for vectors, for data.frames data is sorted internally.