nunique: Count unique occurrences of variables
In Animal: Analyze time-coded animal behavior data

Description Usage Arguments Details Value Author(s) Examples

Returns the number of unique occurrences of each level in the input object.

1	nunique(x)

`x`	Numeric, character of factor vector

Provides a convenient way to calculate the unique occurrences of certain events in daily, hourly, weekly and monthly data e.g. calculate the number of unique animals that have used the feeding throughs each hour in dataset RIC (see examples).

Number of unique levels in the input object.

Matti Pastell <matti.pastell@helsinki.fi>

#Lets count the number of unique cows that have started to eat each hour
#in the dataset RIC.
data(RIC)
data <- clean.RIC(RIC)
hourly(RIC$cowID,RIC$begin,nunique)