[R] biplot.default

[Jungyeon Yoon]

Hi,

I've been trying to understand biplot. From
getAnywhere(biplot.default), I could get the source code. However, there
is one line that did make sense to me. It's the second line from the
bottom.

arrow(0, 0, y[,1]*0.8, y[,2]*0.8, col = col[2],....)

I don't understand why there is a multiplication by 0.8 for y.

Thanks.