title: Multiple histogram plots from list using ggplot2-R
body: <p>Let say I have a list(list1) which elemnets are data frames(df1,df2,..,dfn) with same row numbers.</p>
  
  <p>And let each data frame have different number of columns. </p>
  
  <p>Let</p>
  
  <pre><code>list1[[1]]:
  
  df1:
  
  
  df$v1=rnorm(100);
  
  df$v2=2*rnorm(100);
  
  df$v3=3*rnorm(100);
  </code></pre>
  
  <p>How can I plot each variable's histogram using ggplot2 package? </p>
  
  <p>@MLavoie I want 3 plots in 3 differrent graphs. </p>
  
  <p>I will be very glad for any help. Thanks a lot.</p>