nr: Convenience functions for rows or columns manipulations.
In SciViews: SciViews - Main package

Description Usage Arguments Format See Also Examples

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.

nr(x)

nc(x)

ROWS

COLS

`x`	Any object.

An object of class numeric of length 1.

NROW()

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)