Draw uncertainty band around last process

nnfwtbn/plot.py

@@ -253,7 +253,7 @@ def hist(dataframe, variable, bins, stacks, selection=None,
 
                 # Draw uncertainty band
                 if (uncertainty > 0).any():
-                    band_lower = bottom - uncertainty
+                    band_lower = bottom + histogram - uncertainty
                     axes.hist(bin_centers, bins=bins, bottom=band_lower,
                               weights=uncertainty * 2, fill=False, hatch='/////',
                               linewidth=0, edgecolor="#666666")