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>
- Re: take square of the second and third column of a table