[R] Identify command in R]

hadley wickham h.wickham at gmail.com
Fri Nov 21 02:06:34 CET 2008

Reading in between the lines a little, maybe you want

lm(..., na.action = na.exclude)

That should return missing values for the influence statistics when
the predictor or responses is missing in the input.


On Thu, Nov 20, 2008 at 4:19 PM, David Kaplan
<dkaplan at education.wisc.edu> wrote:
> Let me try to be more specific.
> The x y coordinates are different because of NAs in the dataset.  In this
> analysis, a set of hat values (a measure of influence in regression) is
> given for each observation.  On the basis of the regression that was run to
> get these hat values, the sample size was 1164 (one removed due to NA).  The
> length of the data set is 1165.  If I remove the NA from the data set, I can
> get identify to run.  What I would like to know is if there is a way to get
> identify to ignore the NAs?
> Thanks in advance,
> --
> =======================================================================
> David Kaplan, Ph.D.
> Professor
> Department of Educational Psychology
> University of Wisconsin - Madison
> Educational Sciences, Room, 1061
> 1025 W. Johnson Street
> Madison, WI 53706
> email: dkaplan at education.wisc.edu
> homepage:
> http://www.education.wisc.edu/edpsych/default.aspx?content=kaplan.html
> Phone: 608-262-0836
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