Summary Statistics for Censored Data

Produces basic, and hopefully useful, summary statistics on censored data.

censummary(obs, censored, groups = NULL, ...)

censummary.default(obs, censored, ...)

censummary.factor(obs, censored, groups, ...)

censummary.numeric(obs, censored, groups, ...)

Arguments

obs

A numeric vector of observations.

censored

A logical vector indicating TRUE where an observation in obs is censored (a less-than value), and FALSE otherwise.

groups

Optional grouping variable (factor or numeric) used to compute summaries by subset.

...

Additional arguments passed to methods.

Value

An object of class "censummary" containing summary statistics, or a list of such objects if grouped.

Details

This is a generic function with methods for numeric vectors and grouped data.

The generic function dispatches to methods based on the presence and type of groups:

censummary.default

Basic summary for numeric vectors.

censummary.factor

Summary grouped by a factor variable.

censummary.numeric

Summary grouped by a numeric grouping variable (converted to factor).

References

Helsel, Dennis R. (2005). Nondetects and Data Analysis: Statistics for Censored Environmental Data. John Wiley and Sons, USA, NJ.