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MathGroup Archive 2000

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Need to reduce 2 lists so that only {x,y} pairs with same x remain

  • To: mathgroup at smc.vnet.net
  • Subject: [mg24134] Need to reduce 2 lists so that only {x,y} pairs with same x remain
  • From: materialsscientist at my-deja.com
  • Date: Wed, 28 Jun 2000 02:11:51 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,

I have 2 lists of data:

for example
data1={{1,1},{1.5,1.5},{2,2},{3,3},{4,4},{5,5}}

data2={{1,2},{2,3},{3,4},{4,5},{6,7},{7,8}}


I want to do a point by point comparision, so I
need to reduce both data1 and data2 so that
common x data in the {x,y} pairs for each list
remain.

Thus the lists should look like this:

data1={{1,1},{2,2},{3,3},{4,4}}
data2={{1,2},{2,3},{3,4},{4,5}}

What function(s) would to something like this?

Thanks,

Chuck



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