daily: Calculate daily values from time series
In Animal: Analyze time-coded animal behavior data

Description Usage Arguments Value Author(s) See Also Examples

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

1	daily(data, time, fun = sum, subject = NULL)

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

A data.frame with following elements

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

Matti Pastell <matti.pastell@helsinki.fi>

monthly, hourly, weekly

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