Sundar,

> Perhaps this will work for you?
> 
> plot(1:10)
> w <- par("pin")[1]/diff(par("usr")[1:2])
> h <- par("pin")[2]/diff(par("usr")[3:4])
> asp <- w/h

Thank you for your help.  For vertical exaggeration I will make a slight
change to make it more intuitive (for me):

w <- diff(par("usr")[1:2]) / par("pin")[1]  # plot units per inch
horizontal axis
h <- diff(par("usr")[3:4]) / par("pin")[2]  # plot units per inch
vertical axis
vertical.exaggeration <- w/h

Scott Waichler

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