agrego opcion de ancho de bin en applet histogram

pyLIAF/artiq/applets/histogram.py

@@ -19,11 +19,17 @@ class MakeHistogramAndPlot(pyqtgraph.PlotWidget):
             y = y[~np.isnan(y)]
             #print(self.args.x)
             #if len(y[~np.isnan(y)]) > 5: return
+
             if self.args.x is None:
+                if self.args.binw is None:
                     x = 'auto'
+                else:
+                    binw = float(self.args.binw)
+                    x = np.arange(y.min(), y.max()+2*binw, binw)
             else:
                 x = data[self.args.x][1]
-        except KeyError:
+        except KeyError as e:
+            raise e
             return
 
         # This makes the histogram with the full datasets
@@ -39,7 +45,9 @@ class MakeHistogramAndPlot(pyqtgraph.PlotWidget):
 def main():
     applet = TitleApplet(MakeHistogramAndPlot)
     applet.add_dataset("y", "Y values")
+    applet.add_dataset("binw", "Bin widths", required=False)
     applet.add_dataset("x", "Bin boundaries", required=False)
+    # applet.add_dataset("binw", "Bin widths", required=False)
     applet.run()
 
 if __name__ == "__main__":