Change error bars of the excess plot to approximate symmetric error bar
@@ -205,7 +205,7 @@ class PlotMixin:
kwargs_npred_signal = kwargs_npred_signal or {}
# Determine the uncertainty on yerr
- yerr = (-self._counts_statistic.compute_errn(), self._counts_statistic.compute_errp())
+ yerr = -self._counts_statistic.error
plot_kwargs = kwargs.copy()
plot_kwargs.update(kwargs_excess)
