title: Extracting Random effects from nlme summary
body: <p>I can extract Fixed effects from the nlme summary using <code>summary(fm1)</code>. But struggling how to get <code>Random effects:</code> portion.</p>
  
  <pre><code>fm1 &lt;- lme(distance ~ age, Orthodont, random = ~ age | Subject)
  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, Log-Cholesky parametrization
              StdDev    Corr  
  (Intercept) 2.3270340 (Intr)
  age         0.2264278 -0.609
  Residual    1.3100397       
  
  Fixed effects: distance ~ age 
                  Value Std.Error DF   t-value p-value
  (Intercept) 16.761111 0.7752460 80 21.620377       0
  age          0.660185 0.0712533 80  9.265333       0
   Correlation: 
      (Intr)
  age -0.848
  
  Standardized Within-Group Residuals:
           Min           Q1          Med           Q3          Max 
  -3.223106086 -0.493761144  0.007316631  0.472151121  3.916033210 
  
  Number of Observations: 108
  Number of Groups: 27 
  </code></pre>
  
  <p>Any help will be highly appreciated. Thanks</p>