title: Changing color for treemap in tmPlot in R
body: <p>How can i create treemap with only two colors(red(-ve) and green(+ve)) exactly. I am currently using tmPlot and here follows my sample data and sample code.</p>
  
  <pre><code>index vSize vColor
  S1    100    1
  S2    150   -1
  S3    125    1
  S4    267   -1 
  
       svg("sample.svg")
       library(treemap)
       tmPlot(data,c("index"),"vSize","vColor","comp")
       dev.off()
  </code></pre>
  
  <p>Thanks in Advance</p>