Tom after you send me your email I did this:
(newUnit(Sr, "ries", "R")*newUnit(SI, "ries", "R")*newUnit(Sh, "ries",
"R"))*(newUnit(Ts, "ries", "R") + (newUnit(P, "ries", "R") + newUnit(P1,
"ries", "R") + newUnit(P2, "ries", "R")))
This is the only way that I saw a correct evaluation of the formula and I see
it when I plot each layer values as Value plots.
If I just run (Sr*SI*Sh)*(Ts + Tp) I get a bad value something like (4*5*2)*(3
+ 50) = 4 and since I use precipitation accumulated 72 hr I must get a high
value.
So could be true about the incompatibility between Ts and Tp so am wondering
what could be the best way to reassign unit here because the output like 250 or
450 is going to be in hight risk, low risk.
Bay the way I am trying to write a procedure like this one
def landSlideH(sr, si, sh, ts, tp, tpr, tpre):
ptot= tp + tpr + tpre
h = (sr*si*sh)*(ts + ptot)
return h
Can I use newUnit inside it?
Thanks
Luis
-----Original Message-----
From: Tom Whittaker [mailto:whittaker@xxxxxxxx]
Sent: martes, 07 de diciembre de 2010 03:23 p.m.
To: Luis Del Castillo
Cc: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] IDV formulas
Hi Luis...
It would seem to me that if there is a unit compatibility issue with
this formla:
equation is H = (Sr*SI*Sh)*(Ts + Tp) .
it would have to be between Ts and Tp. Is that true? Or is there
some other issue here?
Best wishes,
tom
--
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI 53706 USA
ph: +1 608 262 2759
