Displaying 1 result from an estimated 1 matches for "buildingarea".
2007 Jul 26
1
zeroinfl() or zicounts() error
...most models I try, but when I include either
of 2 covariates, I get an error.
When I include "PopulationDensity", I get this error: Error in solve.default
(as.matrix(fit$hessian)) : system is computationally singular:
reciprocal condition number = 1.91306e-34
When I include "BuildingArea", I get this error: Error in optim(fn =
loglikfun, par = c(start$count, start$zero, if (dist == :
non-finite finite-difference value [2]
I tried fitting the models using zicounts in the zicounts library as well
and had the same difficulty.
When I include "PopulationDensity", it...