title: Wordcloud: Bigger font for lower tf-idf values
body: <p>I am trying to form a word cloud for the tf-idf values:</p>
  
  <p>Below are the tf-idf values in the dataframe. When I try to form a word cloud, the values with higher values, in this case "seat - 2.57" is shown in largest font. But I need the vice-versa. "Nice - 2.088" to have a bigger font as it is of higher importance. </p>
  
  <pre><code>[[u'nice' 2.0886619578149417]
   [u'owl' 2.2729656758128876]
   [u'person' 2.386294361119891]
   [u'read' 2.455287232606842]
   [u'seat' 2.5766480896111092]]
  </code></pre>
  
  <p>Below is the code:</p>
  
  <pre><code>print(top_10.values)
  d = {}
  for a, x in top_10.values:
      d[a] = x
  
  import matplotlib.pyplot as plt
  from wordcloud import WordCloud
  
  wordcloud = WordCloud()
  wordcloud.generate_from_frequencies(frequencies=d)
  plt.figure( figsize=(20,10) )
  plt.imshow(wordcloud, interpolation="bilinear")
  plt.axis("off")
  plt.show()
  </code></pre>