[R-sig-ME] standar error for the fixed effects

[Ken Beath]

On 24/09/2009, at 9:27 PM, FMH wrote:

> Thank you for the hint. I've even tried it but it did not give any  
> standard error for the fixed effects.
>

I'm not certain what you mean. They are clearly there after Value.

Ken

 > summary(fm1)
Linear mixed-effects model fit by REML
  Data: Orthodont
        AIC      BIC    logLik
   454.6367 470.6173 -221.3183

Random effects:
  Formula: ~age | Subject
  Structure: General positive-definite
             StdDev    Corr
(Intercept) 2.3270338 (Intr)
age         0.2264276 -0.609
Residual    1.3100399

Fixed effects: distance ~ age
                 Value Std.Error DF   t-value p-value
(Intercept) 16.761111 0.7752461 80 21.620375       0
age          0.660185 0.0712533 80  9.265334       0
  Correlation:
     (Intr)
age -0.848

Standardized Within-Group Residuals:
          Min           Q1          Med           Q3          Max
-3.223106065 -0.493760858  0.007316633  0.472151095  3.916032722

Number of Observations: 108
Number of Groups: 27
 >


>
> ----- Original Message ----
> From: Ken Beath <ken at kjbeath.com.au>
> To: FMH <kagba2006 at yahoo.com>
> Cc: r-sig-mixed-models at r-project.org
> Sent: Thursday, September 24, 2009 11:52:31 AM
> Subject: Re: [R-sig-ME] standar error for the fixed effects
>
> summary(fm1)
>
> Obtaining a copy of Pinheiro and Bates is strongly recommended.
>
> Ken
>
> On 24/09/2009, at 8:28 PM, FMH wrote:
>
>> Dear All,
>>
>> Herewith, is a sample of mixed model command from the help menu.
>>
>> fm1 <- lme(distance ~ age, data = Orthodont) # random is ~ age
>> fm1
>>
>> I noticed that there is no standard error for the fixed effects.
>> Could someone advice me the way to extract it?
>>
>> Thank you
>> Fir
>>
>>
>>
>>
>> _______________________________________________
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>>
>
>
>
>