Displaying 1 result from an estimated 1 matches for "mhveg".
2006 Oct 15
1
gamma distribution don't allow negative value in GLMs?
Dear friends,
when i use glm() to fit my data, i use
glm(formula = snail ~ vegtype + mhveg + humidity + elevation + soiltem, *family
= Gamma(link = inverse),* data =a,))
It shows: error in eval(expr, envir, enclos) : *gamma distribution don't
allow negative value*.
But i use
result<-glm(formula = snail ~ vegtype + mhveg + humidity + elevation +
soiltem, family = poisson, data =a...