support plotting on a log scale

1 files changed, 12 insertions, 3 deletions

diff --git a/oplot.py b/oplot.py
index 86d292c..fd969de 100755
--- a/oplot.py
+++ b/oplot.py
@@ -41,7 +41,10 @@ options = [
     o('-b', '--binsize', action='store', dest='binsize', type='float',
       help='set binsize of histogram'),
 
-    ]
+    o(None, '--ylog', action='store_true', dest='ylog',
+      help='use logarithmic y-axis'),
+
+   ]
 
 defaults = {
     # output options
@@ -60,7 +63,7 @@ defaults = {
 
     'xmax'    : None,
     'ymax'    : None,
-
+    'ylog'    : False,
     }
 
 
@@ -213,11 +216,17 @@ class OverheadPlotter(defapp.App):
             % self.options.binsize
 
         if self.options.ymax:
-            p.yrange = (0, self.options.ymax)
+            if self.options.ylog:
+                ymin = 0.5 if not self.options.normalize else 0.0001
+            else:
+                ymin = 0
+            p.yrange = (ymin, self.options.ymax)
 #        p.yrange = (0, (ceil(numpy.amax(hist[:,1]) / 100.0) * 100))
         p.xticks = (0, 10)
         p.curves = [curve(histogram=fname, col=2, labels_col=4)]
 
+        p.ylog = self.options.ylog
+
         #### Styling.
 
         if not self.setup_png(p):