title: How can I highlight a dot in a cloud of dots with Matplotlib?
body: <p>I'm using Matplotlib and my goal is highlighting some points in a scatterplot. </p>
  
  <p>I used the following code:</p>
  
  <pre><code>$colors = {'true':'red', 'false':'blue'}
  
  plt.scatter(data[T[j]], data[T[i]], c=data['upgrade'].apply(lambda x: colors[x]) $
  </code></pre>
  
  <p>This code let my dots being red if the condition is "true", else blue.
  I haven't any problem until I had the following example:</p>
  
  <p>20k dots and just 1 is TRUE. 
  The plot that I obtained can't display my only point, because I have a cloud full of blue dots (2k) and just one should be red. </p>
  
  <p>My question is if there is some way to show my only red dots, in general, to let red dots being more highlighted than the blue. </p>
  
  <p>Thank you.</p>