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
I think the 0 values for snail are hurting you.
Kees
On Sunday 15 October 2006 13:10, zhijie zhang wrote:
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:
