[R-sig-eco] angular statistics

[Ivailo]

On Fri, Oct 18, 2013 at 6:16 AM, Michael Marsh <swamp at blarg.net> wrote:
>
> If you want a measure of exposure, i. e., heat, I suggest using the "heatload" transformation suggested by McCune and Grace (2002). Their assumption is that mid-afternoon, when the sun is in the southwest, is usually the warmest time of day. The formula at the end of Chapter 3 follows:
>
> heat load index=(1-cos(degrees-45))/2
>
> McCune, Bruce and James B. Grace. 2002. Analysis of ecological communities. MJM Software Design. Gleneden Beach, Oregon. USA

Thanks for the interesting discussion!

I'd like to add that although I don't have the book, I found the
radiation measures presented in the following paper:
McCune, B. and D. Keon. 2002. Equations for potential annual direct
incident radiation and heat load. Journal of Vegetation Science
13:603–606.

Cheers,
Ivailo
-- 
UBUNTU: a person is a person through other persons.