plotWindrose: plotWindrose help function called by windrose
In ca-vi/Climatology_Package: Package for the chair of Climatology at TU Berlin

This function was extracted from the no longer supported climatol package. It creates a windrose with bluish colors.

1	plotWindrose(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, 1, 0), key = TRUE, uni = "m/s", ...)

`frec`	This has to be a matrix or a data.frame containing frequencies of different classes (like a histogramm). It can be 2-dimensional. (e.g. windspeed and winddirection)
`fnum`
`fint`
`flab`
`ang`
`col`
`margen`
`key`
`uni`
`...`