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File:Piecharts.svg

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Original file(SVG file, nominally 689 × 494 pixels, file size: 39 KB)

Summary

Example of a pie chart, along with a bar plot showing the same data and indicating that the pie chart is not the best possible chart for this particular dataset.

The graphic was created by User:Schutz for Wikipedia on 28 August 2007 using the R statistical project. The program that generated the graphic is given below. The graph was exported in postscript format, converted to SVG using the pstoedit command, and the layout was slightly modified using Inkscape before upload.

R logo.svg
This chart was created with R+pstoedit+Inkscape:

R code

a <- matrix(c(17, 18, 20, 22, 23,
                20, 20, 19, 21, 20,
                23, 22, 20, 18, 17), nrow=3, byrow=T)
  titles <- c("A", "B", "C")
  cols <- c("red", "blue", "green", "yellow", "black")
  
  postscript("piecharts.eps", paper="special", width=8, height=6)
  
  defaultmar <- par()$mar
  layout(matrix(c(1,3,5,
                  2,4,6), nrow=2, byrow=T), height=c(1,1))       
  par(cex=1)
  par(font=1)
  par(las=1)
  par(font.axis=1)
  par(mgp=c(1,1,0))
  
  for (i in 1:nrow(a)) {
    par(mar=c(0,0,2,0))
    pie(a[i,], init=90, clockwise=T, col=cols, radius=0.8)
    title(main=titles[i], line=0)
    par(mar=defaultmar+c(-2,-1.5,-4,-0.5))
    par(mgp=c(0,0.5,0))
    barplot(a[i,], horiz=F, xlim=c(0,10), ylim=c(0,25), col=cols, border=0,
            names.arg=1:5, space=0.8, axes=F)
    par(mgp=c(0,1,0))
  
    abline(h=5*1:5, col="white")
    axis(2)
  }
  
  dev.off()


Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 1.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current08:33, 28 August 2007Thumbnail for version as of 08:33, 28 August 2007689 × 494 (39 KB)Schutz== Summary == Example of a pie chart, along with a bar plot showing the same data and indicating that the pie chart is not the best possible chart for this particular dataset. The graphic was created by User:Schutz for Wikipedia on 28 August 2007 usi
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