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Question on Ordering

  • To: mathgroup at
  • Subject: [mg47007] Question on Ordering
  • From: "Owen, HL (Hywel)" <H.L.Owen at>
  • Date: Sat, 20 Mar 2004 03:50:20 -0500 (EST)
  • Sender: owner-wri-mathgroup at

I have two sets of data A and B of the same length, that I'd like to plot
one against the other - this is easy of course:


What I'd like to do next is to colour each point according to the value of B
(or A in principle). The points are easily generated using:


And if I have a list of colours C I can do something like


The question is how to generate the list of colours C. Note that I don't
want to sort A and B, since I want to leave them alone to plot {A,D}, {A,E}
later on.

I tried various combinations of Ordering[] and Position[] but didn't get
anywhere. Anyone have any idea?



Hywel Owen                                      h.owen'at'
Accelerator Science and Technology Centre
Daresbury Laboratory, Warrington WA4 4AD, UK
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