define y_limits in truth_reconstruction.py for text location on plots

benchmarks/dis/analysis/truth_reconstruction.py

@@ -398,6 +398,7 @@ def particle_plots(boolean_particle):
     ax2.errorbar(-Y_error[1][0], Y_error[1][1], yerr=Y_error[1][3], xerr=Y_error[1][2] ,fmt='None', ecolor = 'orange', elinewidth = 1)
     ax3.errorbar(-Y_error[0][0], Y_error[0][1], yerr=Y_error[0][3], xerr=Y_error[0][2] ,fmt='None', ecolor = 'orange', elinewidth = 1)
     ax4.errorbar(-Y_error[1][0], Y_error[1][1], yerr=Y_error[1][3], xerr=Y_error[1][2] ,fmt='None', ecolor = 'orange', elinewidth = 1)
+    y_limits = ax3.get_ylim()
     for each_bin in range(len(Y_error[0][0])):
         if not np.isnan(Y_error[0][1][each_bin]):
             ax3.text(x=-Y_error[0][0][each_bin]-0.1,y=y_limits[1] - Y_error[0][4]*10,