Dear R-help,
In nlme package, anova () can be used to test the difference between
two coefficients as shown on page 225
of "Mixed Effects Models in S and S-Plus":
anova(fm2BW.lme, L = c("Time:Diet2" = 1, "Time:Diet3" = -1))
Now my question is instead of test the difference between two
coefficients, can I use anova to test the significance of the sum of
two coefficients, like
anova(fm2BW.lme, L = c("Time:Diet2" = 1, "Time:Diet3" = 1))
Thanks,
Shirley
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