AW: Assigning names to columns of a matrix

*To*: mathgroup at smc.vnet.net*Subject*: [mg49452] AW: [mg49438] Assigning names to columns of a matrix*From*: Matthias.Bode at oppenheim.de*Date*: Wed, 21 Jul 2004 06:39:12 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi Greg, what about Clear[a, b, c, d] mat = {{a, b}, {c, d}} matT = Transpose[mat] column01 = matT[[1]] column02 = matT[[2]] ? Best regards, Matthias Bode Sal. Oppenheim jr. & Cie. KGaA Untermainanlage 1 D-60329 Frankfurt am Main GERMANY Tel.: +49(0)69 71 34 53 80 Mobile: +49(0)172 6 74 95 77 Fax: +49(0)69 71 34 95 380 E-mail: matthias.bode at oppenheim.de Internet: http://www.oppenheim.de -----Ursprüngliche Nachricht----- Von: Gregory Lypny [mailto:gregory.lypny at videotron.ca] Gesendet: Dienstag, 20. Juli 2004 13:53 An: mathgroup at smc.vnet.net Betreff: [mg49438] Assigning names to columns of a matrix Hello everyone, I'm starting an analysis of a 7,320 x 16 matrix of data called sessionAData. I'd like to assign a name to each of the 16 columns, that is, the variables, so that I can refer to them by name and not waste memory. Would I, for example, simply create new vectors from each column of the matrix, such as investmentWeight = sessionAData[[All,6]] to create a variable called "investmentWeight" equal to the sixth column of the matrix? Or should I use Take as in investmentWeight = Take[sessionAData[[All,6]]] ? Greg