These post processing codes are used to present the results from IRGAN
Two kinds of results are used here: 1, log file, which is named as worker%3A0%3A0_results.log for example, 2. long tail file, which are d_ckpt_1.longtail.compare and g_ckpt_1.longtail.compare
plot_together.py can plot the above two kinds of results into one figure.