m01def

Purpose

Synopsis

[irank,ifail] = m01def(rm<,order,ifail>)

Description

 
 M01DEF ranks the rows of a matrix. The ordering is determined by
 first  ranking the data in column 1, then ranking any tied rows 
 according to the data in column 2, and so on.
 
 M01DEF uses a variant of list-merging. The routine takes 
 advantage of natural ordering in the data, and uses a simple list 
 insertion in a preparatory pass to generate ordered lists of 
 length at least 10. The ranking is stable: equal rows preserve 
 their ordering in the input data.
 

Parameters

m01def

Required Input Arguments:

rm (:,:)                              real

Optional Input Arguments:                       <Default>

order (1)                             string   'a'
ifail                                 integer  -1

Output Arguments:

irank (:)                             integer
ifail                                 integer