[R] contrasts for lmer model

[Kay Cichini]

plugged it together myself -
obviously this should work:

m0<-lm(rich ~ gap*stage,data=richness)

cc<-contrast(m0,
list(stage = levels(stage), gap = "1"),
list(stage = levels(stage), gap = "0"))

# plug in matrix from contrast(m0)
summary(glht(m3, linfct = cc$X)) 


         Simultaneous Tests for General Linear Hypotheses

Fit: glmer(formula = rich ~ gap * stage + (1 | site), family = poisson, 
    REML = 1)

Linear Hypotheses:
       Estimate Std. Error z value Pr(>|z|)    
1 == 0  0.04820    0.15594   0.309   0.9965    
2 == 0 -0.44679    0.10204  -4.379 4.78e-05 ***
3 == 0 -0.52847    0.09133  -5.786 2.88e-08 ***
4 == 0 -0.44396    0.15549  -2.855   0.0171 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 
(Adjusted p values reported -- single-step method)

-----
------------------------
Kay Cichini
Postgraduate student
Institute of Botany
Univ. of Innsbruck
------------------------

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