workaround to matplotlib bug in fill_between() for large plots

rhapsody/predict/figures.py

@@ -221,7 +221,12 @@ def print_sat_mutagen_figure(filename, rhapsody_obj, res_interval=None,
     # average pathogenicity profile
     x_resids = np.arange(1, upper_lim+1)
     # shading showing range of values
-    ax2.fill_between(x_resids, min_p, max_p, alpha=0.5,
+    # NB: a bug in pyplot.fill_between() arises when selecting a region with
+    # set_xlim() in a large plot (e.g. > 1000), causing the shaded area to
+    # be plotted even though it's outside the selected region. As a workaround,
+    # here I slice the plot to fit the selected region.
+    sl = slice(max(1, res_i-2), min(res_f+2, upper_lim+1))
+    ax2.fill_between(x_resids[sl], min_p[sl], max_p[sl], alpha=0.5,
                      edgecolor='salmon', facecolor='salmon')
     # plot average profile for other predictions, if available
     if extra_plot is not None: