Adding columns and rows to a table
- To: mathgroup at smc.vnet.net
- Subject: [mg33439] Adding columns and rows to a table
- From: "Philip M. Howe" <pmhowe at lanl.gov>
- Date: Thu, 21 Mar 2002 09:27:24 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Hello,
I want to add to a table two columns that match the last column, and
two rows that match the last row.
Thus, if my table is
{{1,2,3,4},{5,6,7,8},{9,10,11,12}}; I want to modify it such that I
end up with
{{1,2,3,4,4,4}, {5,6,7,8,8,8}, {9,10,11,12,12,12}, {
9,10,11,12,12,12}, {9,10,11,12,12,12}};
This works:
tab1 = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};
tab1c = Transpose[
Append[Append[Transpose[tab1], Transpose[tab1][[-1]]],
Transpose[tab1][[-1]]]];
tab1d = Append[Append[tab1c, tab1c[[-1]]], tab1c[[-1]]] // TableForm
However, I bet there are much more efficient and elegant ways of
doing this. Any suggestions?
Thanks in advance for the help. The ideas I obtain from you folks
are extremely helpful.
Regards,
Phil
--
Philip M. Howe
Program Manager, Stockpile Surety
Los Alamos National Laboratory
(505) 665-5332
(505) 667-9498
Fax: 505-665-5249
email pmhowe at lanl.gov
Mail Stop P945