[R] And about sum() ...Re: Minor warning about seq
dwinsemius at comcast.net
Tue Nov 30 19:59:38 CET 2010
On Nov 30, 2010, at 1:49 PM, Prof. John C Nash wrote:
> I spent more time than I should have debugging a script because I
> but typed
> seq(0:100) yields 1 to 101,
> Clearly my own brain to fingers fumble, but possibly one others may
> want to avoid it.
I discovered some flakey code (that ran without syntactic error and
sometimes even without semantic error) that was intended to add a risk
estimate from a number of completed years of exposure to a fractional
sum(q[1:4] + frac*q)
... looked to my brain as sensible, but was actually adding the
fractional risk to each of the q[1:4]'s before summation occurred.
(Should have been ...
sum(q[1:4] , frac*q)
David Winsemius, MD
West Hartford, CT
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