RE: proper way to manipulate lists?

*To*: mathgroup at smc.vnet.net*Subject*: [mg40203] RE: [mg40182] proper way to manipulate lists?*From*: "David Park" <djmp at earthlink.net>*Date*: Tue, 25 Mar 2003 14:50:29 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Nathan, data = Table[{i, i + 1}, {i, 1, 5}] {{1, 2}, {2, 3}, {3, 4}, {4, 5}, {5, 6}} {a, b}# & /@ data {{a, 2 b}, {2 a, 3 b}, {3 a, 4 b}, {4 a, 5 b}, {5 a, 6 b}} David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Nathan Moore [mailto:nmoore at physics.umn.edu] To: mathgroup at smc.vnet.net I'm sure this is a one-liner, but it has stumped me for years. Suppose I'm working with a 2-d array of data, data = {{x1,y1},{x2,y2}...{xN,yN}}; and I want to transform the data according to, data2 = {{x1*a,y1*b},{x2*a,y2*b}...{xN*a,yN*b}}; The only way I know to do this is to move the data to excel, performing the transform and then move the data back to Mathematica. This is crazy - there must be a better way - is there? Please tell me there is! regards, Nathan Moore, University of Minnesota Physics Department