title: using R package 'effects' in R version 3.4.4
body: <p>Currently, I'm using R version 3.4.4.
  And I'm trying to use R package 'effects'.
  But I can't install &amp; use this package on this version.</p>
  
  <pre><code>code
  install.packages("effects")
  library(effects)
  plot(allEffects(lm_g_sc), type="response")
  </code></pre>
  
  <p>results</p>
  
  <blockquote>
    <p>Warning in install.packages :   package ‘effects’ is not available
    (for R version 3.4.4)</p>
  </blockquote>
  
  <p>What can I do?
  If I can't use this package, there are some alternative packages?</p>