weekly: Calculate weekly values from time series

In Animal: Analyze time-coded animal behavior data

Description

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

Usage

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

Arguments

data	A data vector that you want to calculate the weekly 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 weekly values for each cow in a herd.

Value

A data.frame with following elements

Week	Week number
Subject	Appears only if you have specified a subject
Result	The result of the function

Author(s)

Matti Pastell <[e-mail]>

See Also

daily, hourly, monthly

Examples

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

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