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...seasons during 3 years and 2 season during the last year, factor named percod, with 11 levels) of a bird presence/absence (pres.f) on 14 artificial ponds (charca.f). The ponds are integrated in 4 greater spatial units (zepa). I have 11 explanatory variables, some of them are continuous (prof1,prof2,prof4,capac,perim_veget,div_veg,div_herp) and some are factors (ungul.f,ganado.f,turb.f,peces.f). Not all artificial ponds have been monitored in all seasons, so I have some missing values in the dependent variable. I have thought that the correct model should be, ignoring the spatial pseudorreplicati...

Hi I have the following formula (I hope it is clear - if no, I can try to do better the next time) h(x, a, b) = integral(0 to pi/2) ( ( integral(D/sin(alpha) to Inf) ( ( f(x, a, b) ) dx ) dalpha ) and I want to do an mle with it. I know how to use mle() and I also know about integrate(). My problem is to give the parameter values a and b to the