title: Plotting large datasets with ggplot
body: <p>I have a large dataframe composed of more than 10 million rows containing both time and numerical variables. What I would like to do, is to use <code>ggplot</code> 's <code>geom_line()</code> to plot a time series but when I run the code it returns an empty plot with only x and y axis. However, an object is created under the type &quot;large gg&quot;. Do you have any suggestions on how to deal with this problem?
  I want to precise that reducing the number of rows it's not a viable option for me due to the fact that I am already trying to use a reduced dataframe of a shorter time window(around 3 millions of rows) and I still haven't solved the problem.</p>