File:Simpsons-vector.svg
Summary
| Description | Illustration of Simpson's paradox applied to vectors | ||
| Date | |||
| Source | Own work | ||
| Author | Schutz | ||
| SVG development | Category:Valid SVG created with R code#Simpsons-vector.svgCategory:Pictures showing a librsvg bug (overwritten with a workaround)#Simpsons-vector.svg
| ||
| Source code | R codesuccess1 <- c( 8, 1)
total1 <- c(10,10)
success2 <- c( 6, 3)
total2 <- c( 6,17)
printaddvec <- function( vec1, vec2, ...) {
segments( vec1[1], vec1[2], vec1[1]+vec2[1], vec1[2]+vec2[2], lty=3, ... )
segments( vec2[1], vec2[2], vec1[1]+vec2[1], vec1[2]+vec2[2], lty=3, ... )
arrows(0,0, vec1[1], vec1[2], angle=20, code=2, lwd=2, ...)
arrows(0,0, vec2[1], vec2[2], angle=20, code=2, lwd=2, ...)
arrows(0,0, vec1[1]+vec2[1], vec1[2]+vec2[2], angle=20, code=2,
lwd=2, lty=2, ...)
# Redraw the end of the arrows
arrows(0.99*(vec1[1]+vec2[1]), 0.99*(vec1[2]+vec2[2]),
vec1[1]+vec2[1], vec1[2]+vec2[2], code=2, lwd=2, angle=20, ...)
}
postscript("simpsons-vector.eps", paper="special", height=5, width=5,
horizontal=F)
par(xaxs="i")
par(yaxs="i")
par(cex=1.2)
par(las=1)
par(mgp=c(2.5 ,1 ,0))
par(mar=c(4.1, 4.1, 0.6, 0.6))
plot(0, type="n", xlim=c(0,25), ylim=c(0,10), pty="s", xlab="Total", ylab="Successes")
printaddvec( c(total1[1], success1[1]), c(total1[2], success1[2]), col="blue")
printaddvec( c(total2[1], success2[1]), c(total2[2], success2[2]), col="red")
text(total1[2], success1[2]+0.0, "1", pos=4, col="blue", cex=1.2)
text(total2[2], success2[2]+0.0, "1", pos=4, col="red", cex=1.2)
text(total1[1]+0.0, success1[1], "2", pos=3, col="blue", cex=1.2)
text(total2[1]+0.0, success2[1], "2", pos=3, col="red", cex=1.2)
text(sum(total1), sum(success1)+0.0, "+", pos=3, col="blue", cex=1.2)
text(sum(total2), sum(success2)+0.0, "+", pos=3, col="red", cex=1.2)
dev.off()
|
#Simpsons-vector.svg){kind=link}
The graphic was created by User:Schutz for Wikipedia on 26 August 2007, using the R statistical project. The program that generated and exported the graphic is given above; the uploaded version was generated by converting the EPS file generated by R to SVG format using pstoedit command. The layout was slightly modified using Inkscape before upload.
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
 |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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