A vector specifying the dimensions of a 3D or 4D array.
voxdim
The dimensions of each voxel.
sigma
The 3D covariance matrix of the field.
ksize
The size (in voxels) of the kernel with which to filter the independent field.
mask
A 3D mask for the field.
type
If type=="field" then the simulated field together with the maximum of the field is returned.If type=="max" then the maximum of the field is returned.
Details
The function works by simulating a Gaussian r.v at each voxel location and the smoothing the field with a discrete filter to obtain a field with the desired covariance structure.
Value
mat
Contains the simulated field if type=="field", else NULL