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Assign party members to seats

election.Rd

Create a layout for an election result in an assembly

Usage

election(seats,result,formula,colours = sample(rainbow(length(counts))))

Arguments

seats

A data frame of x and y positions, row numbers and angles (usually the output from the seats function).

result

A data frame with party names and seat counts.

formula

A formula with the party name column on the left and the count column on the right. Think of the twiddle symbol as "got".

colours

A vector of colours. If missing a random rainbow is used. This may cause Green parties to show as red.

Value

A data frame including:

x

The x positions of the seats to be plotted on semi-circular arcs.

y

The y positions of the seats to be plotted on semi-circular arcs.

r

The row numbers for each seat.

theta

The angle of each seat, going from pi to zero radians.

party

The labels for the party holding each seat.

colour

The colour that has been assigned to the party.

Author

Barry Rowlingson

See also

seats

Examples

 # The EU parliament has 751 seats, and Wikipedia currently shows this
 eu = structure(list(colour = c("#3399FF", "#F0001C", "#0054A5", "#FFD700",
 "#990000", "#909090", "#32CD32", "#40E0D0"), party = c("EPP",
 "S and D", "ECR", "ALDE", "GUE-NGL", "Non-Inscrits", "Greens-EFA",
 "EFDD"), members = c(220L, 191L, 70L, 68L, 52L, 52L, 50L, 48L
 )), .Names = c("colour", "party", "members"), row.names = c(NA,
 -8L), class = "data.frame")
 strasbourg = seats(751, 16)
 eugov = election(strasbourg, eu, party~members, colours=eu$colour)
 oldmar<-par(mar=c(2,4,4,2))
 plot(eugov$x, eugov$y, col=eugov$colour, asp=1, pch=19, ylim=c(-2,2.5),
  xlab="", ylab="", main="EU Parliament 2014", axes=FALSE)
 legend(-0.7,-0.3,eu$party,fill=eu$colour)

 par(oldmar)
 # or using ggplot2
 if (FALSE) { 
  require(ggplot2)
  blank = theme(axis.line=element_blank(),
        axis.text.x=element_blank(),
  axis.text.y=element_blank(),
  axis.ticks=element_blank(),
  axis.title.x=element_blank(),
  axis.title.y=element_blank(),
  panel.background=element_blank(),
  panel.border=element_blank(),
  panel.grid.major=element_blank(),
  panel.grid.minor=element_blank(),
  plot.background=element_blank())
  ggplot(eugov, aes(x=x,y=y,col=party)) + geom_point() + coord_fixed() + blank
 }