# Robust and Resistant Techniques

These are the available functions for robust and resistant techniques. See each function's help topic in the TERR Language Reference for more information.

Function name | Title description
--- | ---
`fivenum` | Tukey Five-Number Summaries
`ksmooth` | Scatter Plot Smoothing
`line` | Robust Line Fitting
`lowess` | Scatter Plot Smoothing
`mad` | Robust Estimates of Scale
`mean` | Mean Value (Arithmetic Average)
`mean.data.frame` | Mean Value (Arithmetic Average)
`mean.Date` | Mean Value (Arithmetic Average)
`mean.default` | Mean Value (Arithmetic Average)
`mean.difftime` | Mean Value (Arithmetic Average)
`mean.POSIXct` | Mean Value (Arithmetic Average)
`mean.POSIXlt` | Mean Value (Arithmetic Average)
`median` | Median
`median.default` | Median
`medpolish` | Median Polish
`smooth` | Nonlinear Smoothing Using Running Medians