R Graphical Manual

Last data update: 2014.03.03

R: zyp.sen

zyp.sen

R Documentation

zyp.sen

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

zyp.sen(formula, dataframe)

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

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.

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.

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