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MathGroup Archive 2011

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Using values from inside a matrix for a new row

  • To: mathgroup at smc.vnet.net
  • Subject: [mg122366] Using values from inside a matrix for a new row
  • From: Michelle A <hfvballgurl33 at gmail.com>
  • Date: Wed, 26 Oct 2011 17:40:58 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hello,
I am new to Mathematica and I am trying to create an array of values
that uses info from the line above.  I'm thinking of it like how Excel
would do it but I'm not sure how to go about it in Mathematica.  I've
been getting the RecursionLimit error when I try to call an earlier
element of the array.

Here is what I'm thinking in a simplified form:

Say I simply want to add a constant (1 here) to each element above. So
I want my answer to be like this:

1 2 3
2 3 4
3 4 5

f = {{1, 2, 3}, {f[[1, 1]] + 1, f[[1, 2]] + 1, f[[1, 2]] + 1}} and
continue to have it grow to be a 10x3 matrix.  I know I'll need some
i's and j's but I can't get it to work.  Do I need to initialize an
array or make a loop to just add one row at a time in a separate
step?

Any help is greatly appreciated.  Thank you




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