[R] inter tick distance

[niels Waller]

R colleagues,

I am stumped. I would like the inter-tick distances to be the same on the x
and y axes but cannot determine how to do so when the lower half of the y
axis is not printed.  Thanks for any and all suggestions. (btw, setting
par(pty="s")  does not solve my problem)

Niels Waller


M<-matrix(c(2,1,
           -1,3),2,2,byrow=TRUE)

dimnames(M)<-list(c("P1","P2"),c("V1","V2"))

writeLines(text=c("\n","Matrix M"))
print(M)

plot(c(-4,4),c(0,4),type="n",xlim=c(-3,3),axes=FALSE,xlab="",ylab="")
axis(side=1,pos=0,labels=FALSE)
axis(side=2,pos=0,labels=FALSE,at=c(0,1,2,3,4))
arrows(0,0,M[1,1],M[1,2],angle=20,length=.15,lwd=2)
arrows(0,0,M[2,1],M[2,2],angle=20,length=.15,lwd=2)





*******************************************************
Niels Waller, Ph.D.
Director of Quantitative Methods and Evaluation
Department of Psychology and Human Development
Vanderbilt University
Phone: (615) 322-8380    email: niels.waller at vanderbilt.edu
QME Home page: http://www.vanderbilt.edu/quantmetheval/
*******************************************************

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