[R] Spatial sampling problem
Moshe Olshansky
m_olshansky at yahoo.com
Tue Aug 7 07:07:23 CEST 2007
Hi SK,
If I understand you correctly you are trying to assign
to each point of a 10x10 2D grid a normal variable
with a certain dependency between the values at each
grid point. Is this correct?
If so, please explain the dependence structure. Do you
need something like X(i,j) = f(i,j) + Z(i,j) for
1<=i,j<=10 where f is a deterministic function and
Z(i,j) are independent normal variables? Or do you
want to assume that Z(i,j) have a multivariate normal
distribution (and can specify the covariance matrix)?
Regards,
Moshe.
--- sk <sdk0084 at yahoo.com> wrote:
> Hi All,
> I am new in R and trying to simulate random normal
> 2D field with mean trend say north-south. My domain
> is 10x10 grid and I am trying to use mvnorm but do
> not know how to specify the domain and the mean
> field.
> I would appreciate any help.
> Cheers, SK
>
>
> ---------------------------------
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