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2008 Aug 01
2
contour lines in windows device but neither in pdf nor in postscript
library(mvtnorm)
x = seq(-4,4,length=201)
xy = expand.grid(x,x)
sigma = (diag(c(1,1))+1)/2
d2 = matrix(dmvnorm(xy,sigma=sigma),201)
xsamp = rmvnorm(200,sigma=sigma)
contour(x,x,d2)
points(xsamp,col=3,pch=16)
pdf("pdftry.pdf")
contour(x,x,d2)
points(xsamp,col=3,pch=16)
dev.off()
postscript("pstry.ps")
contour(x,x,d2)
points(xsamp,col=3,pch=16)
dev.off()
# I can see contour lines in a window device but I can't see them in
files pdftry.pdf and pstry.ps
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