Add (semi)logarithmic plotlog control to plotinfo

mementum · mementum · commit 744dc15de82e · 2017-05-30T23:32:58.000+02:00
diff --git a/backtrader/plot/plot.py b/backtrader/plot/plot.py
@@ -754,6 +754,10 @@ def plotdata(self, data, indicators):
 
         self.pinf.legpos[a] = len(self.pinf.handles[a])
 
+        if data.plotinfo._get('plotlog', False):
+            a = axdatamaster or ax
+            a.set_yscale('log')
+
     def show(self):
         self.mpyplot.show()
 
