On Sun, 10 Apr 2011, Hadley Wickham wrote:
Okay, I understand what you are trying to do. Yes, you have fooled codetools
in this instance.
...but notice that the codetools warning is just that: It _is_ acknowledged
that these things occasionally happen by design. There are a couple of cases in
base R too:
* checking R code for possible problems ... NOTE
glm.fit: no visible binding for global variable ‘n’
Are you sure that's not a bug? There's:
aic.model <- aic(y, n, mu, weights, dev) + 2 * rank
and n.ok is defined, but n isn't defined anywhere.
It is (or should be) defined by the call to
eval(family$initialize)
quantile.ecdf: no visible binding for global variable ‘y’
I wonder why it warns on y, but not nobs.
It does when run on stats:::quantile.ecdf directly:
codetools::checkUsage(stats:::quantile.ecdf)
<anonymous>: no visible binding for global variable ‘nobs’
<anonymous>: no visible binding for global variable ‘y’
Maybe in the context where you saw this nobs is defined in an
enclosing environment.
luke
Hadley
--
Luke Tierney
Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa Phone: 319-335-3386
Department of Statistics and Fax: 319-335-3017
Actuarial Science
241 Schaeffer Hall email: l...@stat.uiowa.edu
Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
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