Merges segments by level.

Iterates through given segments and merges by level or by chromosome arm. In other words, we are keeping track of whenever we change chromosome arm or level.

Usage

GatherSegmentsByLevels(segments, granges_obj)

Arguments

segments

A data frame containing segment data. For the first pass, these segments are those with size >= 3mb. Their last column should be their level, and should be non-zero (i.e. already determined)

granges_obj

A GRanges object: used to obtain genomic data from regions we're merging.