windrose: Wind-rose plot

In climatol: Climate Tools (Series Homogenization and Derived Products)

Wind-rose plot

Description

This function plots a wind-rose from a data frame with columns DateTime, Wind direction and Wind speed.

Usage

windrose(dat, cols=1:3, code='', name='', uni='m/s', maxnsc=8, fnum=4, fint=5,
flab=2, pal=c('cyan','yellow','orange','red','brown'), ang=-3*pi/16,
margin=c(0,0,4,0), ...)

Arguments

dat	Data frame with columns DateTime, Wind direction and Wind speed.
cols	Columns containing DateTime, Wind direction and Wind speed [1:3].
code	Station code.
name	Station name.
uni	Speed units for the legend header ['m/s'].
maxnsc	Maximum number of wind speed classes [8].
fnum	Number of reference circles to plot [4].
fint	Frequency interval (in %) between reference circles [5].
flab	Parameter indicating which circles must be labelled: 1: Label outer circle only, 2: Label all circles (the default), Other value: Do not label any circle.
pal	Color gradation to fill the frequency polygons.
ang	Angle along which circles will be labeled, in radians [-3*pi/16].
margin	Margins vector for the plot (to be passed to par) [c(0,0,4,0)].
...	Other graphic parameters.

Details

After reading the data, a frequency table is calculated in 16 wind directions and a variable number of wind speed classes. The wind direction data must be provided in degrees.

This table, which covers all available pairs of wind direction and speed present in the data frame, is the basis of the wind-rose plot.

Value

The table of wind frequencies by direction and speed classes is returned invisibly.

Examples

data(climatol_data) #load example data
windtable <- windrose(AWS_1year, 1:3, 'st123', 'My airport') #plot windrose
print(windtable) #display the table of calculated wind frequencies

climatol documentation built on April 20, 2023, 5:08 p.m.