title: Rename a sequence of variable names in data frame
body: <p>I have 5 columns in a data frame and I would like to rename the variable names as Var1, Var2, Var3, Var4, Var5. </p>
  
  <p>My current approach is not very convenient:</p>
  
  <pre><code>names(mydata)[1:10] &lt;- c("Var1", "Var2", "Var3", "Var4", "Var5")
  </code></pre>
  
  <p>Is there a better way so that when I have 100 variables, I don't have to type all 100 names?</p>