title: Missing bar on bar chart in Python
body: <p>I'm having trouble creating a bar plot in Python. I'm trying to represent gender in a bar plot. There are 3 variables, male, female and unknown. The values originally came from a data frame in which I added a row which calculates the totals of each column.
  The totals row contains:</p>
  <pre><code>Male       2216732.0
  Female     2856302.0
  Unknown       8354.0
  </code></pre>
  <p>I am then plotting this totals row.
  I have the following:</p>
  <pre><code>demo_gender.iloc[211].plot(kind=&quot;bar&quot;,color=['cyan', 'magenta', 'red'],alpha=0.8) #barchart of final row of data frame
  plt.xlabel('Gender') #x-axis label
  plt.title('Bar chart of gender',fontsize=12) #title
  plt.gcf().axes[0].yaxis.get_major_formatter().set_scientific(False) #get rid of scientific notation
  </code></pre>
  <p>When I run the above code a bar plot is produced. However it is only displaying bars for male and female but not for unknown even though there is a label and space for it created on the plot.</p>
  <p>I am wondering is it not displaying because the value for unknown is so low compared to male and female? And if so is there a way to make it display it? I've included a copy of the barplot I'm getting atm.</p>
  <p><a href="https://i.stack.imgur.com/2RN0j.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2RN0j.png" alt="enter image description here" /></a></p>