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MathGroup Archive 2000

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Re: Newbie question

  • To: mathgroup at
  • Subject: [mg25284] Re: Newbie question
  • From: leko at (J. Leko)
  • Date: Tue, 19 Sep 2000 03:45:09 -0400 (EDT)
  • References: <8q3dvc$>
  • Sender: owner-wri-mathgroup at


Using rules you could do this:

In[157]:= data = {{x, y}, {x1, y1}, {x2, y2}, {x3, y3}}

Out[157]= {{x, y}, {x1, y1}, {x2, y2}, {x3, y3}}

In[158]:= data1 = data /. {x_, y_} -> {x, 1/y}

Out[158]= {{x, 1/y}, {x1, 1/y1}, {x2, 1/y2}, {x3, 1/y3}}

This uses the ReplaceAll (/.) command (see section 2.4.1 in The
Mathematica Book).


J. Leko
University of Alabama in Huntsville

Please reply to leko*j at

In article <8q3dvc$kbb at>, Jose M Lasso <jml at> wrote:

> Hi Mathgroup,
> I have some numerical data: data:={{x,y},{x1,y1},{x2,y2}....{xn,yn}}, 
> I want to transform the data like this: 
> data1:={{x,1/y},{x1,1/y1},{x2,1/y2}....{xn,1/yn}}, how can I do this 
> transformation? Thanx in advance. Regards
> Jose M Lasso

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