On Tue, 20 May 2008, [EMAIL PROTECTED] wrote:
Hi,
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
A bit more context would help. The output of sessionInfo() at least (R and
package versions may matter), plus the preceding code, including the
definition of rams_dak.dnear3k.listw - is it row-standardised? Running
traceback() immediately after the error would also be helpful to see where
in functions called by sar.error.f.M() the problem is occurring. If I
understand correctly, the error messages cycle, but the rams_dak3k.err
object is created? Could you run it with quiet=FALSE, so see the function
values as they are generated in optimize()? The NAs usually come from the
interval= being too broad wrt. your weights style.
Roger
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.
Thanks,
Heather Sander
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: [EMAIL PROTECTED]
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