Inline below. Bert Gunter Genentech Nonclinical Biostatisics
-----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of David Winsemius Sent: Monday, August 24, 2009 8:53 AM To: David Winsemius Cc: r-help@r-project.org Help; ted.hard...@manchester.ac.uk Subject: Re: [R] robust method to obtain a correlation coeff? On Aug 24, 2009, at 11:38 AM, David Winsemius wrote: > ... but I do not know what those "certain situations" really are. So there are some function that may be affected by settings of options("na.action") but I cannot tell you where to find a list of such functions. --- Because this is up to the whim of package developers, there is no such list. In general, most of the modeling functions of base R and recommended packages, e.g. lm, glm, rlm in MASS, lme in nlme,... have an na.action argument. But not universally: e.g. loess() has an na.action argument, but lowess() does not. A real gotcha with missing values is that some of R's core arithmetic functions like mean(), median(), sum() etc. use a logical argument, na.rm = TRUE or FALSE to control the handling of missings (as I'm sure you know). -- Bert ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
