title: heatmap in R how to resize columns labels?
body: <p>I have a data.matrix that is approximately 4000 rows and 100 columns. I am doing a heatmap of the data like:</p>
  
  <pre><code>data&lt;-heatmap(data_matrix,Rowv=NA,Colv=NA,col=cm.colors(256),scale="column",margins=c(5,10))
  </code></pre>
  
  <p>But the problem that I got is that the labels that appear in the column are too grouped, so it is impossible to visualize them correctly. How I can resize the heatmap so I can see the values of the labels of the column? I tried to print it in pdf, but it only appears a black stripe.
  Thanks</p>
  
  <p>I am including a figure of the heatmap, the portion that I want to see are the labels that are in the right part, but they are too close together.
  <img src="https://i.stack.imgur.com/Hl47m.jpg" alt="enter image description here"></p>