Classify wind direction and speed records

Classifies wind direction and speed records into a matrix of percentages of observations in speed and direction bins.

Usage

bin.wind.records(winddir,windspeed,ndir=8,radians=FALSE,
  speed.breaks=c(0,10,20,30))

Arguments

winddir: A vector of wind directions.
windspeed: A vector of wind speeds corresponding to the above directions.
ndir: Number of direction bins in a compass circle.
radians: Whether wind directions are in radians.
speed.breaks: Minimum wind speed for each speed bin.

Details

bin.wind.records bins a number of wind direction and speed records into a matrix of percentages of observations that can be used to display a cumulative wind rose with oz.windrose The defaults are those used by the Australian Bureau of Meteorology.

Value

A matrix of percentages in which the rows represent wind speed categories and the columns represent wind direction categories.

Author

Jim Lemon

Examples

 winddir<-sample(0:360,100,TRUE)
 windspeed<-sample(0:40,100,TRUE)
 bin.wind.records(winddir,windspeed)
#>      [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8]
#> [1,]    1    1    0    2    2    1    2    1
#> [2,]    2    2    2    1    4    3    3    4
#> [3,]    4    4    2    1    4    3    2    4
#> [4,]    2    2    4    2    2    0    0    5
#> [5,]    2    1    4    4    3    5    4    5