rowRanks: Gets the rank of each row (column) of a matrix
Description
Gets the rank of each row (column) of a matrix.Usage
rowRanks(x, ...)
colRanks(x, ...)
Missing and non- values
These are ranked as NA, as with na.last="keep"
in the rank() function.Ties
Ties are ranked equally, as with setting ties.method="max"
in the rank() function.Details
The row- (column-) ranks of x are collected as rows
of the result matrix.
The implementation is optimized for both speed and memory.
To avoid coercing to doubles (and hence memory allocation), there
is a unique implementation for integer matrices.
Currently, colRanks(x) is just rowRanks(t(x)).
Any names of x are ignored and absent in the result.See Also
rank().
For developers, see also Section 'Utility functions' in
'Writing R Extensions manual', particularly the native functions
R_qsort_I() and R_qsort_int_I().