Re: Using values from inside a matrix for a new row

*To*: mathgroup at smc.vnet.net*Subject*: [mg122408] Re: Using values from inside a matrix for a new row*From*: Ray Koopman <koopman at sfu.ca>*Date*: Thu, 27 Oct 2011 06:34:02 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <j89vb0$1st$1@smc.vnet.net>

On Oct 26, 2:50 pm, Michelle A <hfvballgur... at gmail.com> wrote: > 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 NestList[#+1&, {1, 2, 3}, 9] {1, 2, 3} {2, 3, 4} {3, 4, 5} {4, 5, 6} {5, 6, 7} {6, 7, 8} {7, 8, 9} {8, 9, 10} {9, 10, 11} {10, 11, 12}