oce (version 1.7-8)

errorbars: Draw error bars on an existing xy diagram

Description

Draw error bars on an existing xy diagram

Usage

errorbars(x, y, xe, ye, percent = FALSE, style = 0, length = 0.025, ...)

Arguments

x, y

coordinates of points on the existing plot.

xe, ye

errors on x and y coordinates of points on the existing plot, each either a single number or a vector of length identical to that of the corresponding coordinate.

percent

boolean flag indicating whether xe and ye are in terms of percent of the corresponding x and y values.

style

indication of the style of error bar. Using style=0 yields simple line segments (drawn with segments()) and style=1 yields line segments with short perpendicular endcaps.

length

length of endcaps, for style=1 only; it is passed to arrows(), which is used to draw that style of error bars.

...

graphical parameters passed to the code that produces the error bars, e.g. to segments() for style=0.

Author

Dan Kelley

Examples

library(oce)
data(ctd)
S <- ctd[["salinity"]]
T <- ctd[["temperature"]]
plot(S, T)
errorbars(S, T, 0.05, 0.5)