ff: matcomb – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

matcomb

Array: make matrix indices from row and columns positions

create matrix indices from row and columns positions

matcomb(r, c)

`r`	integer vector of row positions
`c`	integer vector of column positions

rows rotate faster than columns

a k by 2 matrix of matrix indices where k = length(r) * length(c)

Jens Oehlschlägel

matcomb(1:3, 1:4)
  matcomb(2:3, 2:4)

Memory-Efficient Storage of Large Data on Disk and Fast Access Functions

v4.0.4

GPL-2 | GPL-3 | file LICENSE

Authors

Daniel Adler [aut], Christian Gläser [aut], Oleg Nenadic [aut], Jens Oehlschlägel [aut, cre], Martijn Schuemie [aut], Walter Zucchini [aut]

Initial release

2020-10-13