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st: RE: odd behavior in ado file


From   austin nichols <[email protected]>
To   [email protected]
Subject   st: RE: odd behavior in ado file
Date   Fri, 22 Jul 2005 09:33:15 -0400

Note that local f = (`y' - 1)/ln(`1')
not f = (`y' - 1)/ln(`y')
 (for arg 1, =(exp(1) - 1)/ln(exp(1))),
so you are dividing by ln(1), or dividing by zero, 
so the result is missing.

-----Original Message-----
From: Katsuhide Isa [mailto:[email protected]]
Sent: Friday, July 22, 2005 9:11 AM
Subject: st: odd behavior in ado file
I wrote the following simple ado file.
/*----------myboxcox.ado----------*/
program define myboxcox
version 7
local y = exp(`1')
if `y' == 1 {
   di in gr "f = " 1
   }
else {
   local f = (`y' - 1)/ln(`1')
   di in gr "f = " "`f'"
   }
end
/*----------myboxcox.ado----------*/

It works well all in all. But it sometimes shows an odd 
behavior. 
More specifically, when typed - myboxcox 1 - (namely, setting 
the argument as 1), the result is ". "(missing?), not 1.7182818 
(=(exp(1) - 1)/ln(exp(1))).

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