Re: tablename[[x]]= xth row, how to get xth column

*To*: mathgroup at smc.vnet.net*Subject*: [mg88605] Re: tablename[[x]]= xth row, how to get xth column*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Fri, 9 May 2008 07:16:44 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <g00v0k$gl7$1@smc.vnet.net>

cimon wrote: > a very simple question, "sometablename[[X]]" gives me the Xth row of > table , like below. > > f = {{1, 2, 3, 4}, {1, 4, 6, 77}} > {{1, 2, 3, 4}, {1, 4, 6, 77}} > f[[1]] > {1, 2, 3, 4} > > > I am not able to find the syntax that can give me Xth column of a > table. i dont want to transpose it and use. and I tried #, f = {{1, 2, 3, 4}, {1, 4, 6, 77}}; f[[All, 2]] (*Returns the second column without explicitly transposing. Read it as: "Take all the rows and for each of these rows take only the second element"*) {2, 4} (*Similarly, the following extracts the third element of the second row only*) f[[2, 3]] 6 You should read the short tutorial titled "Getting Pieces of Lists" available in the documentation center or online at http://reference.wolfram.com/mathematica/tutorial/GettingPiecesOfLists.html Regards, -- Jean-Marc