file-backed-matrices {BGData} R Documentation

## File-Backed Matrices

### Description

Functions with the chunkSize parameter work best with file-backed matrices such as BEDMatrix objects. To avoid loading the whole, potentially very large matrix into memory, these functions will load chunks of the file-backed matrix into memory and perform the operations on one chunk at a time. The size of the chunks is determined by the chunkSize parameter. Care must be taken to not set chunkSize too high to avoid memory shortage, particularly when combined with parallel computing.

BEDMatrix-class as an example of a file-backed matrix.