Compute row-wise sum and sum of squares for a Filebacked Big Matrix

Efficiently computes row sums and row sum-of-squares for a bigstatsr::FBM using column-wise chunking, suitable for large datasets that cannot be loaded fully into memory.

Usage

computeRowStatsFBM(fbm, ncores = 1)

Arguments

fbm

A bigstatsr::FBM object.

ncores

Integer; number of cores to use for parallel operations (default 1).

Value

A list with two numeric vectors:

row_sums

Sum of each row.

row_sums_sq

Sum of squares of each row.