iso_apply: sensible row- or column- wise operations against a...

In trichelab/enmity: load scNMT data and test HDF5/DelayedArray/restfulSE behavior

Description

For good performance, entire chunks should be loaded; consequently, if MARGIN == 1 (rows), by should be a multiple of chunkdim(X)1, and if MARGIN == 2 (columns), by should be a multiple of chunkdim(X)2. (There is a check included for this, but the principle is worth noting.)

Usage

iso_apply(X, MARGIN, FUN, by = NULL)

Arguments

X	a DelayedArray (e.g. a DelayedMatrix backed by HDF5Array)
MARGIN	apply across rows (1) or columns (2), as in base::apply
FUN	the function to apply to each row or column (see above)
by	the number of rows or columns to load at one time

Details

Remember to setRealizationBackend("HDF5Array") or TileDBArray or whatever.

Value

   a new DelayedArray (presumably of the same dimensions as X)

trichelab/enmity documentation built on Sept. 8, 2020, 8:32 p.m.