[R] Warning message in scatter.smooth (modreg)

Gavin Simpson gavin.simpson at ucl.ac.uk
Tue Jul 1 17:00:59 CEST 2003

Dear list,

In using the scatter.smooth() function (modreg) on a small data set (100 
obs) the following error was produced:

 > scatter.smooth(Na, S)
Warning message:
k-d tree limited by memory. ncmax= 200

I haven't used scatter.smooth much but when I have, I haven't seen this 
message before.

gc() returns

 > gc()
          used (Mb) gc trigger (Mb)
Ncells 417693 11.2     667722 17.9
Vcells 103949  0.8     786432  6.0

This is on a Win XP box with 512 MB RAM, with plenty of space still 
available (Task Manager Reports 216 MB of RAM and pagefile in use).

I have looked through the help files for loess and loess.control but 
didn't see anything about ncmax.  Can someone explain why I might be 
getting this warning?

Many thanks,


 > version
platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
major    1
minor    7.1
year     2003
month    06
day      16
language R

I can send the data if required.
Gavin Simpson                     [T] +44 (0)20 7679 5522
ENSIS Research Fellow             [F] +44 (0)20 7679 7565
ENSIS Ltd. & ECRC                 [E] gavin.simpson at ucl.ac.uk
UCL Department of Geography       [W] http://www.ucl.ac.uk/~ucfagls/cv/
26 Bedford Way                    [W] http://www.ucl.ac.uk/~ucfagls/
London.  WC1H 0AP.

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