Adds output argument

showstyle.py

@@ -12,7 +12,10 @@ ap = argparse.ArgumentParser()
 ap.add_argument('style', help='Which rc file to use.  One of %s' % available)
 ap.add_argument('--plot', default='all', help='One of [scatter, hist, line, image], or '
                 'a comma-separated list of a subset.  Default is all.')
+ap.add_argument('--output', required=False, help='Render the plot to a file')
+print "Here"
 args = ap.parse_args()
+print "Here"
 
 matplotlib.rc_file(os.path.join(HERE, 'rc', args.style))
 
@@ -66,4 +69,7 @@ if 'image' in args.plot or args.plot == 'all':
     ax = fig.add_subplot(224)
     image(ax)
 
-plt.show()
+if args.output:
+    plt.savefig(args.output)
+else:
+    plt.show()