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>