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st: RE: decimal years origins

From   "Nick Cox" <>
To   <>
Subject   st: RE: decimal years origins
Date   Fri, 11 Aug 2006 20:24:43 +0100

The rationale for decimal years is simplicity!


Caleb Southworth
> I'm working on discovering how the data were coded into 
> decimal years. The
> dataset is quite old and the code with it looks like SAS. Using the
> fraction of day elapsed seems reasonable, if complicated, but 
> as Austin
> pointed out these fractions don't neatly correspond to the 
> number of days.
> I will report back.
> Does anyone know the rationale for using decimal years? From web
> searching, it seems like a convention from astronomy.

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