take square of the second and third column of a table

*To*: mathgroup at smc.vnet.net*Subject*: [mg124171] take square of the second and third column of a table*From*: hanciong awesome <hanciong at gmail.com>*Date*: Wed, 11 Jan 2012 17:20:16 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Hello, suppose I have a very long table like this: 1 2 3 4 5 6 7 8 9 ....... 2 3 4 how can I take square of the 2nd and 3rd column? I always do it by making a new table. so let's say the above table is A and it has 100 lines, then I make the new table as the following: B=Table[{A[[n]][[1]],A[[n]][[2]]^2,A[[n]][[3]]^2},{n,1,100}] But if the length of the table is unknown, this way is impractical. Could anyone suggests better way? thank you

**Follow-Ups**:**Re: take square of the second and third column of a table***From:*Barrie Stokes <Barrie.Stokes@newcastle.edu.au>

**Re: take square of the second and third column of a table***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: take square of the second and third column of a table***From:*Tomas Garza <tgarza10@msn.com>

**Re: take square of the second and third column of a table***From:*Bob Hanlon <hanlonr357@gmail.com>