title: Change xticklabels fontsize of seaborn heatmap
body: <p>Here is my question:<br>
  I plot 7 variable's coefficient using sns.clustermap()<br>
  figure here:      </p>
  
  <p><a href="http://i4.tietuku.com/ab10ee8d1983361f.png" rel="noreferrer">http://i4.tietuku.com/ab10ee8d1983361f.png</a>    </p>
  
  <ul>
  <li>x/y tickslabel seems really small(In my case, s1,s2,... s9)</li>
  </ul>
  
  <h3>My attempt</h3>
  
  <ul>
  <li><code>label='big</code> ==> no effect     </li>
  <li>plt.tick_params(axis='both', which='minor', labelsize=12)  ===> cbar lable has changed, but the x/y axes looks the same.</li>
  </ul>
  
  <p><a href="http://i11.tietuku.com/5068224d5bbc7c00.png" rel="noreferrer">http://i11.tietuku.com/5068224d5bbc7c00.png</a>   </p>
  
  <h3>Add</h3>
  
  <p>My code:      </p>
  
  <pre><code> ds =  pd.read_csv("xxxx.csv")
   corr = ds.corr().mul(100).astype(int)
  
   cmap = sns.diverging_palette(h_neg=210, h_pos=350, s=90, l=30, as_cmap=True)
  
   sns.clustermap(data=corr_s, annot=True, fmt='d',cmap = "Blues",annot_kws={"size": 16},)
  </code></pre>