zyp.sen: zyp.sen

In zyp: Zhang + Yue-Pilon Trends Package

zyp.sen

Description

Computes a Thiel-Sen estimate of slope for a vector of data.

Usage

zyp.sen(formula, dataframe)

Arguments

formula	a formula of the form y~x.
dataframe	an optional data frame to use with the formula.

Details

This routine computes Sen's estimate of slope for a vector of data.

The formula specified is of the form y~x, where y is the data and x is the accompanying dates of observation.

If a data frame is specified, the formula selects columns within that data frame; otherwise, the formula uses the specified variables.

Value

A vector containing the coefficients and associated data.

coefficients	the estimated intercept and slope.
slopes	the list of slopes (used for confidence intervals).
intercepts	the list of intercepts (used for confidence intervals.
rank	the rank of the relation (2).
residuals	the residuals of the fitted slope.
x	the original x axis data.
y	the original y axis data.

See Also

zyp.trend.vector, zyp-package, confint.zyp.

Examples

x <- c(0, 1, 2, 4, 5)
y <- c(6, 4, 1, 8, 7)
slope <- zyp.sen(y~x)

zyp documentation built on March 31, 2023, 10:04 p.m.