[R] Odp: pie initial angle

[Petr PIKAL]

Hi

r-help-bounces at stat.math.ethz.ch napsal dne 29.05.2007 12:53:14:

> 
> Dear all,
> 
> I'd like to produce a simple pie chart for a customer (I know it's bad 
but 
> they insist), and I have some difficulties setting the initial angle.
> For example:
> 
> pie(c(60, 40), init.angle=14)
> 
> and 
> 
> pie(c(80, 20), init.angle=338)
> 
> both present the slices in the same direction, where:

I presume you misunderstand init angle. Above statements points an arrow 
of both slices to the similar direction but slices starts at different 
initial angles.

> 
> pie(c(60, 40))
> pie(c(80, 20))
> 
> present the slices in different directions.

The arrow slices point to different direction **but** they both **start** 
at the same initial angle 0 deg. 

> 
> I read everything I could about init.angle argument, I even played with 
> various formulas to compute it, but I just can't figure it out.
> How can I preserve the desired *direction* of the slices?

You probably need to compute initial angle based on proportions in your 
pie chart (If you really want each pie chart starting at different 
position). 

Regards
Petr

> 
> Many thanks in advance,
> Adrian
> 
> 
> -- 
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