File: p2p_arrows.R

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r-cran-plotrix 3.8-14-1
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p2p_arrows<-function(x1,y1,x2,y2,space=0.05,col=par("fg"),...) {
 xspace<-(x2-x1)*space
 yspace<-(y2-y1)*space
 arrows(x1+xspace,y1+yspace,x2-xspace,y2-yspace,...)
}