Probably so that the end of the arrow does not overplot the labels.

Kevin

On Wed, Jan 27, 2010 at 10:28 AM, Martin Ivanov <tramni@abv.bg> wrote:

>  Dear forum,
> I need to create biplot graphic. I took a look at the code of the
> biplot.default function from the stats package and I found that the arrows
> for the variables are multiplied by a coefficient of 0.8 before plotting:
> ...
> if (var.axes)
>        arrows(0, 0, y[, 1L] * 0.8, y[, 2L] * 0.8, col = col[2L],
>            length = arrow.len)
> ...
>  I have no idea why this is done. Could somebody clarify?
>
> Thank you in advance.
>
> Regards,
> Martin
>
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>



-- 
Kevin Wright

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