nr {SciViews} | R Documentation |
Convenience functions for rows or columns manipulations.
Description
'nr()' and 'nc()' are synonyms of the ugly 'NROW()' or 'NCOL()' that still provide a result, even if 'dim' attribute of the object is not set, on the contrary to 'nrow()'or 'ncol()'. 'ROWS' and 'COLS' are constants that makes call to 'apply()' more expressive.
Usage
nr(x)
nc(x)
ROWS
COLS
Arguments
x |
Any object. |
Format
An object of class numeric
of length 1.
An object of class numeric
of length 1.
See Also
[NROW()]
Examples
mm <- matrix(1:6, nrow = 3)
nr(mm)
nc(mm)
vv <- 1:6
nr(vv)
nc(vv)
# ROWS and COLS constants used with apply()
apply(mm, ROWS, mean) # Idem apply(mm, 1, mean)
apply(mm, COLS, mean) # Idem apply(mm, 2, mean)
[Package SciViews version 0.9-13.2 Index]