title: Delete missing values detected by ggplot() in R
body: <p>I asked this <a href="https://stackoverflow.com/questions/64030138/many-plots-in-the-same-graph">question</a> to know how it is possible to plot many graphs in the same plot. Following to the answer which I liked and accepted, it is possible to use <code>ggplot()</code> function.</p>
  <p>Now using <code>ggplot()</code>, I receive the following message which notifies that there are missing values were deleted for the plot:</p>
  <pre><code>Warning message:
  Removed 33 row(s) containing missing values (geom_path).
  </code></pre>
  <p>From the produced plot and visualizing, I am satisfied with data after that <code>ggplot()</code> removed the 33 rows.</p>
  <p>I know how to delete rows of NA but here I don't understand if <code>ggplot()</code> deleted rows where there exist NA for at least one variable <strong>OR</strong> removed rows where all variables are NA, knowing that I have 7 variables and there are some rows where all variables are completely NA while many rows contain NA for only some variables.</p>
  <p>Question: Although the rows are already deleted for the plot, how it is possible to remove these rows &quot;the detected 33 rows&quot; completely from data?</p>