Hi all:
I met a question about lmer.
fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
summary(fm1)
...
Fixed effects:
Estimate Std. Error t value
(Intercept) 251.405 6.825 36.84
Days 10.467 1.546 6.77
...
My question:
Why p values of (Intercept) and Days are not given?
Many thanks!
Best.
[[alternative HTML version deleted]]
Try
library(lmerTest)
fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
summary(fm1)
Linear mixed model fit by REML
Formula: Reaction ~ Days + (Days | Subject)
Data: sleepstudy
AIC BIC logLik deviance REMLdev
1756 1775 -871.8 1752 1744
Random effects:
Groups Name Variance Std.Dev. Corr
Subject (Intercept) 612.092 24.7405
Days 35.072 5.9221 0.066
Residual 654.941 25.5918
Number of obs: 180, groups: Subject, 18
Fixed effects:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 251.405 6.825 36.84 < 2e-16 ***
Days 10.467 1.546 6.77 3.27e-06 ***
---
Signif. codes: 0 ?***? 0.001 ?**? 0.01 ?*? 0.05 ?.? 0.1 ? ? 1
Correlation of Fixed Effects:
(Intr)
Days -0.138
Cheers,
Rune
On 19 June 2013 11:27, meng <laomeng_3 at 163.com>
wrote:> Hi all:
> I met a question about lmer.
>
> fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
> summary(fm1)
>
> ...
>
> Fixed effects:
> Estimate Std. Error t value
> (Intercept) 251.405 6.825 36.84
> Days 10.467 1.546 6.77
>
> ...
>
> My question:
> Why p values of (Intercept) and Days are not given?
>
>
> Many thanks!
>
> Best.
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
On Wed, Jun 19, 2013 at 10:27 AM, meng <laomeng_3 at 163.com> wrote:> Hi all: > I met a question about lmer. > > fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy) > summary(fm1) > > ... > > Fixed effects: > Estimate Std. Error t value > (Intercept) 251.405 6.825 36.84 > Days 10.467 1.546 6.77 > > ... > > My question: > Why p values of (Intercept) and Days are not given?Take a look at R FAQ 7.35. http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-are-p_002dvalues-not-displayed-when-using-lmer_0028_0029_003f> > > Many thanks! > > Best. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > 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.