title: How to remove left white space in heatmap.2 output
body: <p>With this code</p>
  
  <pre><code> library(gplots)
  
   # Read data
   dat &lt;- read.table("http://dpaste.com/1501148/plain/",sep="\t",header=T);
   rownames(dat) &lt;- dat$Name
   dat &lt;- dat[,!names(dat) %in% c("Name")]
  
   #Set colour
   hmcols &lt;- rev(redgreen(2750));
  
   pdf("~/Desktop/tmp.pdf")
  
   # Plot the figure, we don't want KEY in the plot and no dendrograms also.
   heatmap.2(as.matrix(dat),Colv=FALSE,dendrogram="none",scale="row",col=hmcols,trace="none",  margin=c(5,15), lwid=c(1.5,2.0),key=FALSE);
   dev.off()
  </code></pre>
  
  <p>It output the following figure:
  <img src="https://i.stack.imgur.com/Er8r2.jpg" alt="enter image description here"></p>
  
  <p>Note that it has too many white space on the left. 
  How can I remove it?
  In principle I want to do left-justify of the whole heatmap. </p>