text: user3107: How to interpret heat map and dendrogram output for biological data (omics) in words (when writing results and discussion)?
  What should I consider (statistics behind?) and what is the best approach?
  Here is one of my HM for proteomics data.
  Script being used
  col <- colorRampPalette(c("red","yellow","darkgreen"))(30) 
  png("HM1.png")
  heatmap.2(as.matrix(df), Rowv = T, Colv = FALSE, dendrogram = "row", #scale = "row", col = col, density.info = "none", trace = "none", margins = c(7, 15) )
  dev.off()
  
  
  Heat Map output.
  I would be greatful if you would give an example.
  
  user48: The dendrogram summarize the information of a group of values and sort them according to the similarity they have. It can be applied to both, samples and features.
  The dendrogram allows to visualize features that are more similar together, usually revealing patterns that wouldn't have been seen otherwise. 
  In an article usually it is used something like: "we can see that X and Y are clustered together revealing that ... (they have something in common), while Z and A are clustered far"
  
  user3085: You may be interested in reading up on heatmaps. For a history perspective (pre the biological introduction by Eisen et al. ) read The History of the Cluster Heat Map by Wilkinson and Friendly 
  
original_text: 3107: <p>How to interpret heat map and dendrogram output for biological data (omics) in words (when writing results and discussion)?</p>
  
  <p>What should I consider (statistics behind?) and what is the best approach?</p>
  
  <p>Here is one of my HM for proteomics data.</p>
  
  <p>Script being used</p>
  
  <pre><code>col &lt;- colorRampPalette(c("red","yellow","darkgreen"))(30) 
  png("HM1.png")
  heatmap.2(as.matrix(df), Rowv = T, Colv = FALSE, dendrogram = "row", #scale = "row", col = col, density.info = "none", trace = "none", margins = c(7, 15) )
  dev.off()
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/FefR3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FefR3.png" alt="Heatmap output"></a>
  Heat Map output.</p>
  
  <p>I would be greatful if you would give an example.</p>
   48: <p>The dendrogram summarize the information of a group of values and sort them according to the similarity they have. It can be applied to both, samples and features.</p>
  
  <p>The dendrogram allows to visualize features that are more similar together, usually revealing patterns that wouldn't have been seen otherwise. </p>
  
  <p>In an article usually it is used something like: "we can see that X and Y are clustered together revealing that ... (they have something in common), while Z and A are clustered far"</p>
   3085: <p>You may be interested in reading up on heatmaps. For a history perspective (pre the biological introduction by <a href="http://www.pnas.org/content/95/25/14863" rel="nofollow noreferrer">Eisen et al.</a> ) read <em><a href="https://www.cs.uic.edu/~wilkinson/Publications/heatmap.pdf" rel="nofollow noreferrer">The History of the Cluster Heat Map</a></em> by Wilkinson and Friendly </p>
  