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How to subtract two sets of data for a ListPlot

• To: mathgroup at smc.vnet.net
• Subject: [mg76672] How to subtract two sets of data for a ListPlot
• From: chuck009 <dmilioto at comcast.com>
• Date: Fri, 25 May 2007 06:45:29 -0400 (EDT)

Hi all.  Suppose I've calculated two sets of lists of the form for example:

list1={{1,1},{2,2},{3,3}};

list2={{1,1},{2,4},{3,9}};

What's an efficient way to create a third list with the same x-values but with the y-values subtracted

newlist={{1,0},{2,-2},{3,-6}};

I realize I can manually subtract them in a For-loop, but I'm sure a one-line command using Map or some other construct can be used as well but can't figure it out.

Thanks!

• Follow-Ups:
  • Re: How to subtract two sets of data for a ListPlot
    • From: "Patrick Scheibe" <mai99dnn@studserv.uni-leipzig.de>
  • Re: How to subtract two sets of data for a ListPlot
    • From: János <janos.lobb@yale.edu>
  • Re: How to subtract two sets of data for a ListPlot
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>