PGSG A highly nonoptimized implementation of the Proximally Guided Stochastic Subgradient method: https://arxiv.org/abs/1707.03505. Dataset The dataset, trees.bin, is contructed from 102 frames of the "Campus.zip" dataset found here: http://vis-www.cs.umass.edu/~narayana/castanza/I2Rdataset/.