title: How to use a column for a shaded area in ggplot,R?
body: <p>I have a dataframe of 2 columns, my <code>values</code> and the <code>standard error</code>.
  What I want is to plot a line with my values and then add the standard error as a shaded area around my line. 
  I do not even know how to start as most of the <a href="https://rpubs.com/chidungkt/408264" rel="nofollow noreferrer">examples</a> use the <code>geom_ribbon</code> and not an existing column. </p>
  
  <p>I am really confused, is it even possible to plot a shaded area based on an existing column? (any suggestions of tutorials or demos are welcomed!) </p>