Ammonia nitrogen found in river

Description

Monthly levels of ammonia nitrogen in a river over two years

Format

A data frame with 120 observations on the following 3 variables.

nh4

The ammonia nitrogen levels (mg/l). A value of zero corresponds to a censoring, but it really is censored at <0.01

cens

A logical vector indicating if the value was censored

year

The year

Source

Found on the internet and partly simulated

Examples

data(nh4)