[R] Scatterplot matrix - Pearson linear correlation and Density Ellipse

[ashz]

Hi,

strangely, when I run this script:

panel.cor = function(x, y, digits=2, prefix="r=", cex.cor)
{
    usr = par("usr"); on.exit(par(usr))
    par(usr = c(0, 1, 0, 1))
    r = abs(cor(x, y, use="pairwise.complete.obs", method = "pearson"))
    txt = format(c(r, 0.123456789), digits=digits)[1]
    txt = paste(prefix, txt, sep="")
    if(missing(cex.cor)) cex.cor = 0.8/strwidth(txt)
    text(0.5, 0.5, txt, cex = cex.cor)
}

 pairs(cap[8:11], lower.panel=panel.lm, upper.panel=panel.cor, cex=2)


I get linear regression and density ellipse, why?

Is it possible to add also the data point?

Thanks a lot

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