size_n_color: Display circles with specified size and color

Description Usage Arguments Details Value Author(s) See Also Examples

View source: R/size_n_color.R

Description

Display a plot of circles at specified locations, each with a specified size and color.

Usage

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 size_n_color(x=NULL,y,size,sizefun="sqrt",col,main="",
  xlim=NA,xlab="",xat=NULL,xaxlab=NULL,xcex=1,xlas=0,xgrid=FALSE,
  ylim=NA,ylab="",yat=NULL,yaxlab=NULL,ycex=1,ylas=1,ygrid=TRUE,
  mar=c(5,4,4,2),boxit=TRUE,add=FALSE,...)

Arguments

x,y

Vectors or matrices of x and y positions for the symbols.

size

Sizes for the symbols expressed as numbers.

sizefun

The function to use for transforming the values to radii of circles. Square root gives areas proportional to the values.

col

Colors for the symbols (see Details).

main

Title for the plot.

xlim,ylim

Explicit x and y limits for the plot

.

xlab,ylab

Labels for the x and y axes.

xat,yat

Where to place the ticks and tick labels on the axes.

xaxlab,yaxlab

Tick labels for the x and y axes.

xcex,ycex

Character expansions for the axis tick labels.

xlas,ylas

Orientation for the axis tick labels (see par).

xgrid,ygrid

Whether to display a grid along the x or y direction.

mar

Margins for the plot (see Details).

boxit

Whether to draw a box around the plot.

add

Whether to draw a new plot (FALSE) or add symbols to an existing plot (TRUE).

...

Additional arguments passed to plot.

Details

size_n_color plots circles centered on the x and y coordinates. The size and color of the circles may also be specified individually, allowing four dimensions of variation to be displayed on the plot.

size_n_color may also be used to display a "visual table" as in the second example. Here the x and y coordinates are used to associate the symbols with two categorical variables, underlying cause of death and year of observation. If the x values are not passed to the function, it will try to space out the circles evenly in a representation of the matrix. If the matrix is not square, use a plotting device that has about the same proportion of height and width as the matrix.

Value

nil

Author(s)

Jim Lemon

See Also

plot, points, par

Examples

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 meantemp<-c(19,22,25,29,21,20,16,27,23,26)
 totalrain<-c(174,152,196,120,177,183,92,153,161,85)
 numpumpkin<-c(53,47,61,63,38,42,48,71,66,29)
 meanwt<-c(1.5,2.3,2.8,1.9,2.4,1.8,2.6,2.2,1.7)
 size_n_color(meantemp,totalrain,meanwt/5,NA,xlim=c(15,30),
  color.scale(numpumpkin,c(0.8,0),c(0.8,1),0),
  xlab="Temperature (degrees C)",ylab="Rainfall (mm)",
  main="Number and weight of pumpkins by temperature and rainfall",
  xat=seq(15,30,by=5),yat=seq(80,200,by=20))  
 color.legend(15,55,18.5,60,seq(40,70,by=10),
  rect.col=color.scale(seq(40,70,by=10),c(0.8,0),c(0.8,1),0))
 points(15:18,rep(126,4),cex=seq(1.5,3.0,by=0.5))
 text(15:19,rep(134,5),c("1.5","2.0","2.5","3.0","kg"))
 par(xpd=TRUE)
 text(13.5,60,"Number of\npumpkins")
 par(xpd=FALSE)
 # now display a "visual table" of delayed registrations by underlying cause of
 # death and year of observation. The sizes of the circles represent the log of
 # the number of deaths and the colors represent the percentage of deaths that
 # occurred in the year prior to registration or earlier
 data(death_reg)
 size_n_color(x=matrix(rep(1996:2010,each=22),nrow=22),
  y=matrix(rep(1:22,15),nrow=22),size=t(death_reg[[1]])/200,
  col=color.scale(t(death_reg[[2]]),c(0,0.8,1),c(1,0.2,0),0),
  ylim=c(1,22),main="Delayed registrations by ICD chapter",
  xlab="Year",xaxlab=1996:2010,xat=1996:2010,xcex=0.8,
  yaxlab=colnames(death_reg[[1]]),ycex=0.8,ygrid=TRUE,mar=c(5,6,4,2))
 color.legend(1994,-3.5,2000,-2.5,seq(0,50,by=10),cex=0.8,
  rect.col=color.scale(seq(0,50,by=10),c(0,0.8,1),c(1,0.2,0),0))
 par(xpd=TRUE)
 text(1993.4,-2.5,"Pct.\nslow",cex=0.8)
 par(xpd=FALSE)

Example output



plotrix documentation built on Jan. 21, 2021, 9:06 a.m.