as.windrose: Create a windrose Object

In oce: Analysis of Oceanographic Data

Create a windrose Object

Description

Create a wind-rose object, typically for plotting with plot,windrose-method().

Usage

as.windrose(x, y, dtheta = 15, debug = getOption("oceDebug"))

Arguments

x	The x component of wind speed (or stress) or an object of class met (see met), in which case the u and v components of that object are used for the components of wind speed, and y here is ignored.
y	The y component of wind speed (or stress).
dtheta	The angle increment (in degrees) within which to classify the data.
debug	A flag that turns on debugging. Set to 1 to get a moderate amount of debugging information, or to 2 to get more.

Value

A windrose object, with data slot containing

Item	Meaning
n	the number of x values
x.mean	the mean of the x values
y.mean	the mean of the y values
theta	the central angle (in degrees) for the class
count	the number of observations in this class
mean	the mean of the observations in this class
fivenum	the fivenum() vector for observations in this class (the min, the lower hinge, the median, the upper hinge, and the max)

Author(s)

Dan Kelley, with considerable help from Alex Deckmyn.

See Also

Other things related to windrose data: [[,windrose-method, [[<-,windrose-method, plot,windrose-method, summary,windrose-method, windrose-class

Examples

library(oce)
set.seed(1234)
theta <- seq(0, 360, 0.25)
x <- 1 + cos(pi / 180 * theta) + rnorm(theta)
y <- sin(pi / 180 * theta) + rnorm(theta)
wr <- as.windrose(x, y)
summary(wr)

oce documentation built on Sept. 11, 2024, 7:09 p.m.