Wind-rose plot

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Description

Plot of a wind-rose. Wind frequencies may be supplied by speed intervals, and can be absolute or relative.

Usage

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rosavent(frec, fnum=4, fint=5, flab=2, ang=3*pi/16,
col=rainbow(10,0.5,0.92,start=0.33,end=0.2), margen=c(0,0,4,0), key=TRUE,
uni="m/s", ...)

Arguments

frec

Data frame containing the wind frequencies.

fnum

Number of reference circles to plot.

fint

Frequency steps (in %) between reference circles.

flab

Parameter indicating which circles must be labelled:

1:

Label outer circle only,

2:

Label all circles,

Other value:

Do not label any circle.

ang

Angle along which circles will be labelled.

col

Colors to fill the frequency polygons.

margen

Margins vector for the plot (to be passed to par).

key

Set to FALSE if you do not want a legend of the wind-rose, that will otherwise be plotted if frequencies are supplied by speed intervals.

uni

Speed units for the legend header.

...

Other graphic parameters.

Details

The number of direction classes is indifferent: As many as elements of the frequency vector (or columns of the matrix) will be considered, but the first element (column) must correspond to North. Frequencies will be converted to percentages, no matter how they were supplied.

Value

No value is returned by this function.

See Also

plot, par

Examples

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data(windfr)
rosavent(windfr, 4, 4, ang=-3*pi/16, main="Annual windrose")