month.distance: Elapsed time in months
In bsts: Bayesian Structural Time Series

month.distance

R Documentation

Elapsed time in months

Description

The (integer) number of months between dates.

Usage

   MonthDistance(dates, origin)

Arguments

`dates`	A vector of class `Date` to be measured.
`origin`	A scalar of class `Date`.

Value

Returns a numeric vector giving the integer number of months that have elapsed between origin and each element in dates. The daily component of each date is ignored, so two dates that are in the same month will have the same measured distance. Distances are signed, so months that occur before origin will have negative values.

Author(s)

Steven L. Scott steve.the.bayesian@gmail.com

Examples

  dates <- as.Date(c("2008-04-17",
                     "2008-05-01",
                     "2008-05-31",
                     "2008-06-01"))
  origin <- as.Date("2008-05-15")
  MonthDistance(dates, origin) ==  c(-1, 0, 0, 1)

bsts documentation built on May 29, 2024, 2:14 a.m.