Dear Allin,
Thanks. It works perfectly (tested in CVS for windows XP) !
Yi-Nung Yang
2011/7/3 Allin Cottrell <cottrell(a)wfu.edu>
 However, the need to go back and forth between matrices and series
 is not very elegant. In CVS I have now enabled the ranking()
 function for vectors. So this will now work:
 <hansl>
 matrix mx = {1,2,3,4}'
 matrix my = {1,3,5,7,9}'
 matrix Z = msortby((mx ~ 1) | (my ~ 0), 1)
 w1 = sumc(selifr(ranking(Z[,1]), Z[,2]))
 </hansl>
 Allin
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