File:Piecharts.svg

[edit] 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.

 
  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()
  

This chart was created with R.

[edit] Licensing

I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. Public domainPublic domainfalsefalse

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

	Date/Time	Thumbnail	Dimensions	User	Comment
current	08:33, 28 August 2007		689 × 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

• Pie chart
• User talk:Schutz

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