gx.fractile: Estimate the Fractile for a Specified Quantile

In rgr: Applied Geochemistry EDA

Description

Estimates the fractile for a specified quantile of a data set by linear interpolation from the ranked data. If the function is run as temp <- gx.fractile(xx, q) the fractile is not displayed, but retained in temp for subsequent use or display.

Usage

gx.fractile(xx, q, display = TRUE)

Arguments

xx	the data set for which the quantile is to be estimated.
q	the fractile (value) for which the quantile is required, must be within the range of xx.
display	the default is to display the quantile and estimated fractile on the current device. If no display is required, set display = FALSE.

Value

f	the estimated fractile.

Note

Any less than detection limit values represented by negative values, or zeros or other numeric codes representing blanks in the data, must be removed prior to executing this function, see ltdl.fix.df.

Any NAs in the data vector are removed prior to preparing the boxplots.

Author(s)

Based on a script shared on S-News by Nick Ellis, April 2002

See Also

ltdl.fix.df, remove.na, gx.quantile

Examples

## Make test data available
data(kola.o)
attach(kola.o)

## Estimate the fractile for 20 mg/kg As
gx.fractile(As, 20)
temp <- gx.fractile(As, 20)
temp

## Clean-up and detach test data
rm(temp)
detach(kola.o) 

rgr documentation built on May 2, 2019, 6:09 a.m.