title: R: Plot and Save rasterbrick layers separately with common legend scale
body: <p>I have a multiband rasterbrick object and I am looking for an efficient solution to plot and save each of those separately in .jpg format. 
  I cannot use spplot() or levelplot() because the object has 100 layers. </p>
  
  <p>Currently I plan to write each of the layers as separate .tiff and use Arcgis to plot. <a href="https://www.dropbox.com/s/06yq26ohmcyp97b/old_gap_.tif?dl=0" rel="nofollow">Here</a> is the layer I am working on.</p>