Hanna, If you are interested in whether effect of time varies across individuals, why don't you fit a model with the predictors (time*individual) as fixed effects rather than random?
On Mon, Jun 6, 2016 at 10:57 AM, li li <hannah....@gmail.com> wrote: > Hi all, > After fitting a random slope and random intercept model using lme > function, I want > to test whether each of the fixed slopes is equal to zero (The output of > model is below). > Can this be done (testing each individual slope) using multcomp package? > Thanks much for the help. > Hanna > > > summary(mod1)Linear mixed-effects model fit by REML > Data: one > AIC BIC logLik > 304.4703 330.1879 -140.2352 > > Random effects: > Formula: ~1 + time | individual > Structure: General positive-definite, Log-Cholesky parametrization > StdDev Corr > (Intercept) 0.2487869075 (Intr) > time 0.0001841179 -0.056 > Residual 0.3718305953 > > Variance function: > Structure: Different standard deviations per stratum > Formula: ~1 | method > Parameter estimates: > 3 1 2 > 1.00000 26.59750 24.74476 > Fixed effects: reponse ~ method * time > Value Std.Error DF t-value p-value(Intercept) > 96.65395 3.528586 57 27.391694 0.0000 > method2 1.17851 4.856026 57 0.242689 0.8091 > method3 5.87505 3.528617 57 1.664973 0.1014time > 0.07010 0.250983 57 0.279301 0.7810 > method2:time -0.12616 0.360585 57 -0.349877 0.7277 > method3:time -0.08010 0.251105 57 -0.318999 0.7509 > Correlation: > (Intr) methd2 methd3 time mthd2: > method2 -0.726 > method3 -0.999 0.726 > time -0.779 0.566 0.779 > method2:time 0.542 -0.712 -0.542 -0.696 > method3:time 0.778 -0.566 -0.779 -0.999 0.696 > > Standardized Within-Group Residuals: > Min Q1 Med Q3 Max > -2.67575293 -0.51633192 0.06742723 0.59706762 2.81061874 > > Number of Observations: 69 > Number of Groups: 7 > > > [[alternative HTML version deleted]] > > _______________________________________________ > r-sig-mixed-mod...@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models > -- Department of Biology 221 Morrill Science Center 611 North Pleasant St Amherst MA 01003 https://sites.google.com/a/cornell.edu/evan-palmer-young/ [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
