VecStatGraphs2D (version 1.6)

DrawHistogram: Graphic representation of the histogram of the azimuth distribution

Description

This function creates a graph that represents a circumference divided into sectors with different radii. Each radius represents the percentage of azimuth data that belong to each sector. Each portion represents the azimuths that exist between the angles formed by the sides of the portion.

Usage

DrawHistogram(azimuths, ClassSize = 15, Direction = 2)

Arguments

azimuths

Vector containing the values of the azimuths

ClassSize

Integer value that represents the size of each portion. The default value is 15.

Direction

Integer value that indicates the direction of the data. Direction 1 = the mathematical direction (0 grades E counterclockwise). Direction 2 = the topographical direction (0 grades N clockwise). The default value is 2.

Value

• This function returns no value and creates a graph that represents a circular histogram of the input data.

Details

It is very important to always work with the same direction. If the data are loaded in topographical direction and the graphic representation of the histogram in mathematical direction, then the resulting graph will be wrong. This function shows where the highest concentration of points is located. One way to obtain a set of azimuths from X and Y coordinates of the vectors is to use the LoadData function. Typical usages are DrawHistogram(azimuths, \dots) DrawHistogram(azimuths, ClassSize = 20, \dots) ......

References

Website http://gim.unex.es/VecStatGraphs2D/

See Also

DrawDistribution, DrawPoints, DrawModuleAndAzimuthDistribution, DrawDensityMap, DrawVectors.

Examples

FileName<-system.file("data/RectangularData.txt", package="VecStatGraphs2D")
   dat<-LoadData(FileName, Type=2, Direction=2)
   azimuths<-dat[,2]
   DrawHistogram(azimuths, ClassSize=15)