monthly: Calculate monthly values from time series

In Animal: Analyze time-coded animal behavior data

Description

Calculate monthly values (e.g mean or sum) from time series data. Allows to specify a subject to calculate monthly values for several subjects.

Usage

monthly(data, time, fun = sum, subject = NULL)

Arguments

data	A data vector that you want to calculate the monthly values for
time	Time stamps for data in POSIXct format
fun	The function to apply, defaults to sum
subject	You can optionally specify to a subject. e.g. to get monthly values for each cow in a herd.

Value

A data.frame with following elements

Day	Date
Subject	Appears only if you have specified a subject
Result	The result of the function

Author(s)

Matti Pastell <[e-mail]>

See Also

monthly, hourly, weekly

Examples

data(RIC)
RIC2 <- clean.RIC(RIC)
#Monthly feed intake of a whole from data set RIC
herd <- monthly(RIC2$intake,time=RIC2$begin,fun=sum)
#Monthly feed intake of individual cows from data set RIC
herd <- monthly(RIC2$intake,time=RIC2$begin,fun=sum,subject=RIC2$cowID)

Animal documentation built on May 2, 2019, 5:48 p.m.