Calculates the log-likelihood for the Diggle-Rowlingson raised incidence model.
triblik(ccflag, vars=NULL, alphas=NULL, betas=NULL, rho,
which=1:length(alphas), covars=NULL, thetas=NULL)Case-control flag : a vector of ones and zeroes.
A matrix where vars[i,j] is the distance squared from point i
to source j.
The alpha parameters.
The beta parameters.
The rho parameter.
Defines the mapping from sources to parameters.
A matrix of covariates to be modelled as log-linear terms. The element
covars[i,j] is the value of covariate j for case/control i.
The covariate parameters.
The log-likelihood for the given parameters and the given distances and optional covariates is returned.
Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern analysis code in S-Plus. Computers and Geosciences, 19, 627-655; the original sources can be accessed at: http://www.maths.lancs.ac.uk/~rowlings/Splancs/. See also Bivand, R. and Gebhardt, A. 2000 Implementing functions for spatial statistical analysis using the R language. Journal of Geographical Systems, 2, 307-317.