title: Lineplot in Seaborn is "spikey"
body: <p>I am very new to seaborn and I am plotting sales over time for multiple genres of games. When I plot them together, it looks like seaborn is normalizing the data but I would like my y-axis to show the global sales value not normalized.
  To avoid this, I tried setting the estimator in <code>sns.lineplot()</code> to <code>None</code>.</p>
  <p>When I set the estimator to <code>=None</code> for my line-plot, my data suddenly gets all &quot;spikey&quot;. I first thought that maybe my dataset had multiple values for each year or maybe some 0's in there for some reason, but this wasn't the case. For some genres there is no data for certain years, <strong>but</strong> it's getting &quot;spikes&quot; on genres that <strong>have</strong> data for every year.</p>
  <p>Here it is without disabling estimator...</p>
  <pre><code>plt.figure(figsize=(20,10))
  sns.lineplot(data=line_df,x='Year',y='Global_Sales',hue='Genre',ci=None)
  plt.show()
  </code></pre>
  <p><img src="https://i.stack.imgur.com/Fb8uD.png" alt="Plot Without Disabling" /></p>
  <p>And here is it when I disable it and the lines get &quot;spikey&quot;...</p>
  <pre><code>plt.figure(figsize=(20,10))
  sns.lineplot(data=line_df,x='Year',y='Global_Sales',hue='Genre',ci=None, estimator=None)
  plt.show()
  </code></pre>
  <p><img src="https://i.stack.imgur.com/epm64.png" alt="Plot With Disabling" /></p>