[R-sig-Geo] error message when running errorsarlm

evans324 at umn.edu evans324 at umn.edu
Tue May 20 19:04:02 CEST 2008


I'm working on Windows with 2GB RAM and am trying to run the errorsarlm 
with 32 predictor variables and 10,071 records. I created my listw object 
using the dnearneigh function with an upper distance limit of 3000m. I used 
the following code with method=Matrix to deal with memory limitations:

rams_dak3k.err <- errorsarlm(LN_PRICE~., data=reg_vars, 
rams_dak.dnear3k.listw, zero.policy=TRUE, method="Matrix")

When I run this, I get the following error message repeated many times:

Error in stop(gettextf("no method or default for coercing \"%s\" to 
\"%s\"", :
  no function to return from, jumping to top level
In addition: Warning message:
In optimize(sar.error.f.M, interval = interval, maximum = TRUE,  :
  NA/Inf replaced by maximum positive value

I am not sure what this message means. Should I trust the results? Should I 
run the function differently. I appreciate any advice anyone can offer me.

Heather Sander

Heather Sander
Ph.D. Candidate:  Conservation Biology
Office:  305 Ecology & 420 Blegen
University of Minnesota
Dept. of Geography
414 Social Science Bldg.
267 19th Ave. S.
Minneapolis, MN 55455

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