Created
August 26, 2013 05:51
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Venn Diagram in R
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| circle <- function(x, y, r, ...) { | |
| ang <- seq(0, 2*pi, length = 100) | |
| xx <- x + r * cos(ang) | |
| yy <- y + r * sin(ang) | |
| polygon(xx, yy, ...) | |
| } | |
| venndia <- function(A, B, C, getdata=FALSE, ...){ | |
| cMissing <- missing(C) | |
| if(cMissing){ C <- c() } | |
| unionAB <- union(A, B) | |
| unionAC <- union(A, C) | |
| unionBC <- union(B, C) | |
| uniqueA <- setdiff(A, unionBC) | |
| uniqueB <- setdiff(B, unionAC) | |
| uniqueC <- setdiff(C, unionAB) | |
| intersAB <- setdiff(intersect(A, B), C) | |
| intersAC <- setdiff(intersect(A, C), B) | |
| intersBC <- setdiff(intersect(B, C), A) | |
| intersABC <- intersect(intersect(A, B), intersect(B, C)) | |
| nA <- length(uniqueA) | |
| nB <- length(uniqueB) | |
| nC <- length(uniqueC) | |
| nAB <- length(intersAB) | |
| nAC <- length(intersAC) | |
| nBC <- length(intersBC) | |
| nABC <- length(intersABC) | |
| par(mar=c(2, 2, 0, 0)) | |
| plot(-10, -10, ylim=c(0, 9), xlim=c(0, 9), axes=FALSE, ...) | |
| circle(x=3, y=6, r=3, col=rgb(1,0,0,.5), border=NA) | |
| circle(x=6, y=6, r=3, col=rgb(0,.5,.1,.5), border=NA) | |
| circle(x=4.5, y=3, r=3, col=rgb(0,0,1,.5), border=NA) | |
| text( x=c(1.2, 7.7, 4.5), y=c(7.8, 7.8, 0.8), c("2009", "2010", "2011"), cex=2, col="gray90" ) | |
| text( | |
| x=c(2, 7, 4.5, 4.5, 3, 6, 4.5), | |
| y=c(7, 7, 2 , 7 , 4, 4, 5), | |
| c(nA, nB, nC, nAB, nAC, nBC, nABC), | |
| cex=1, col="yellow" | |
| ) | |
| if(getdata){ | |
| list(A=uniqueA, B=uniqueB, C=uniqueC, | |
| AB=intersAB , AC=intersAC , BC=intersBC , | |
| ABC=intersABC | |
| ) | |
| } | |
| } |
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