[Edu-sig] Re: (financial calculation) - using units

[Kirby Urner]

> > def future_value(iday,cday,ivalue,cvalue,years):
> >    days_invested=(cday-iday).days
> >    year_periods=365/days_invested
> 
> Bothered me (too), the year_periods should be of a time-dimension.
> 

Wasn't a bug though.  I used http://support.microsoft.com/?kbid=123198 to
check Arthur's figure for average growth rate and it was correct.

> BTW, how does one express units of measure in Python/programming?

There'd be ways.  MathCad has this built in -- cool feature.  Mathematica
too, plus something about accuracy, as you're probably aware.

The new decimal type has thread-specific accuracy, but I'm not up on how to
use it.  Perhaps I'll learn at Pycon.  Just made my plane rez a couple hours
ago.  My wife is coming along (to DC, not to Pycon).

Kirby