i ran this model
model2-glm(rojos~ageandsex+sector+season+sector:season,quasipoisson)
glht(model2,linfct=mcp(ageandsex=Tukey))
General Linear Hypotheses
Multiple Comparisons of Means: Tukey Contrasts
Linear Hypotheses:
Estimate
M - H == 0 0.2898
SUB - H == 0 -0.2261
SUB - M == 0 -0.5159
I tried to do the same changing factor season (with 2 levels) for month
(with four levels), and i get an error and no results
monthmodel2-glm(rojos~ageandsex+sector+month+sector:month,quasipoisson)
glht(monthmodel2,linfct=mcp(ageandsex=Tukey))
Error en modelparm.default(model, ...) :
dimensions of coefficients and covariance matrix don't match
I understand nothing, Why this is happen.
I beg for your help
-
Mario Garrido Escudero
PhD student
Dpto. de Biología Animal, Ecología, Parasitología, Edafología y Qca. Agrícola
Universidad de Salamanca
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