big_transpose {bigstatsr} | R Documentation |
Transpose an FBM
Description
This function implements a simple cache-oblivious algorithm for the transposition of a Filebacked Big Matrix.
Usage
big_transpose(X, backingfile = tempfile(tmpdir = getOption("FBM.dir")))
Arguments
X |
An object of class FBM. |
backingfile |
Path to the file storing the FBM data on disk. An extension ".bk" will be automatically added. Default stores in the temporary directory, which you can change using global option "FBM.dir". |
Value
The new transposed FBM. Dimensions and type are automatically determined from the input FBM.
Examples
X <- FBM(6, 5, init = rnorm(30))
X[]
Xt <- big_transpose(X)
identical(t(X[]), Xt[])
[Package bigstatsr version 1.6.1 Index]