memory allocation

Dear sirs,

I'm using the Splancs package to compute standard errors of the
estimates of a spatio-temporal k function. When I use as spatial and
temporal distances too long vectors (respectively 60 and 80 entries) for
a dataset of 1000 observations, R gives me the message

The memory demands arise in stvmat() called inside stsecal(), in which an 
(s*tm)*(s*tm) numeric matrix is allocated, described in the code as a 
"full spacetime variance/covariance matrix", and which is necessarily 
large. In your case 23040000 elements are used of 8 bytes each, so to do 
this in the way you describe you need more RAM - the matrix may be copied 
as well. The authors of the package and the underlying method did not 
anticipate needing this high degree of spatial and temporal resolution.

Roger Bivand

Error: cannot allocate vector of size 180000 Kb

Reached total allocation of 512 Mb.

I ran the function memory.size() and obtained 392000000 more or less.

Can anyone help me? 

Thanks in advance.

Massimiliano Copetti

Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no