Re: How to subtract two sets of data for a ListPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg76743] Re: How to subtract two sets of data for a ListPlot
- From: Ray Koopman <koopman at sfu.ca>
- Date: Sat, 26 May 2007 04:48:24 -0400 (EDT)
- References: <f36gb5$9fq$1@smc.vnet.net>
list1 - ({0,1}#&)/@list2
On May 25, 4:12 am, chuck009 <dmili... at comcast.com> wrote:
> 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!