Fanplot {DataVisualizations}

The fan plot

Description

The better alternative to the pie chart represents amount of values given in data.

Usage

Fanplot(Datavector,Names,Labels,MaxNumberOfSlices,main='',col,
MaxPercentage=FALSE,ShrinkPies=0.05,Rline=1.1, lwd=2,LabelCols="black",...)

Arguments

Datavector

[1:n] a vector of n non unique values

Names

Optional, [1:k] names to search for in Datavector, if not set unique of Datavector is calculated.

Labels

Optional, [1:k] Labels if they are specially named, if not Names are used.

MaxNumberOfSlices

Default is k, integer value defining how many labels will be shown. Everything else will be summed up to Other.

main

Optional, title below the fan pie, see plot

col

Optional, the default are the first [1:k] colors of the default color sequence used in this package, otherwise a character vector of [1:k] specifying the colors analog to plot

MaxPercentage

default FALSE; if true the biggest slice is 100 percent instead of the biggest procentual count

ShrinkPies

Optional, distance between biggest and smallest slice of the pie

Rline

Optional, the distance between text and pie is defined here as the length of the line in numerical numbers

lwd

Optional, The line width, a positive number, defaut is 2

LabelCols

Color of labels

...

Further arguments to fan.plot like circumferential positions for the labels labelpos or additional arguments passed to polygon

Details

A normal pie plot is dificult to interpret for a human observer, because humans are not trained well to observe angles [Gohil, 2015, p. 102]. Therefore, the fan plot is used. As proposed in [Gohil 2015] the fan.plot() of the plotrix package is used to solve this problem. If Number of Slices is higher than MaxNumberOfSlices then ABCanalysis is applied (see [Ultsch/Lotsch, 2015]) and group A chosen. If Number of Slices in group A is higher than MaxNumberOfSlices, then the most important ones out of group A are chosen. If MaxNumberOfSlices is higher than Slices in group A, additional slices are shown depending on the percentage (from high to low).

Color sequence is automatically shortened to the MaxNumberOfSlices used in the fan plot.

Value

silent output by calling invisible of a list with

Percentages

[1:k] percent values visualized in fanplot

Labels

[1:k] see input Labels, only relevant ones

Author(s)

Michael Thrun

References

[Gohil, 2015] Gohil, Atmajitsinh. R data Visualization cookbook. Packt Publishing Ltd, 2015.

[Ultsch/Lotsch, 2015] Ultsch. A ., Lotsch J.: Computed ABC Analysis for Rational Selection of Most Informative Variables in Multivariate Data, PloS one, Vol. 10(6), pp. e0129767. doi 10.1371/journal.pone.0129767, 2015.

See Also

fan.plot Piechart

Examples

data(categoricalVariable)
Fanplot(categoricalVariable)