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Re: help with simple data transform

  • To: mathgroup at smc.vnet.net
  • Subject: [mg37750] Re: [mg37734] help with simple data transform
  • From: Selwyn Hollis <selwynh at earthlink.net>
  • Date: Mon, 11 Nov 2002 05:10:11 -0500 (EST)
  • References: <200211101038.FAA11793@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Here's one approach. Define

   f[{x_, y___}] := {x, {y}}

Then map f through a list containing your lists:

In:  f /@ {{n, n, n, n}, {n, n, n, n, n, n}, {n, n, n, n, n}}

Out:   {{n, {n,n,n}}, {n, {n, n, n , n, n}}, {n, {n, n, n, n}}}

----
Selwyn Hollis



Terrell Mitchell wrote:
> I am trying to help a friend at a University create some plots of his 
> data. I have a trial version of Mathematica and it looks like it will 
> do the job, but I need help with a simple problem.
> 
> I have written some code to massage the data and put it in forms for 
> reading into Mathematica.
> 
> I will be doing a surface plot and want to provide can provide my own 
> triangulation data.
> 
> I will have data of the form
> 	n n n n 
> 	n n n n n n
> 	n n n n n
> 	n n
> I can read this into lists and end up with
> 	{n,n,n,n},{n,n,n,n,n,n},{n,n,n,n,n},{n,n}
> I need to turn this into
> 	{n,{n,n,n}},{n,{n,n,n,n,n}},{n,{n,n,n,n}},{n,{n}}
> to use as the triangulation data.
> 
> Can some kind soul provide me with some Mathematica code to transfrom my 
> data into the proper format. There are so many features, there must be 
> some simple transformation code.
> 
> Thank you in advance.
> 
> 




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