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proper way to manipulate lists?

• To: mathgroup at smc.vnet.net
• Subject: [mg40182] proper way to manipulate lists?
• From: Nathan Moore <nmoore at physics.umn.edu>
• Date: Tue, 25 Mar 2003 03:04:24 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

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

• Follow-Ups:
  • Re: proper way to manipulate lists?
    • From: Tomas Garza <tgarza01@prodigy.net.mx>
  • Re: proper way to manipulate lists?
    • From: Dr Bob <drbob@bigfoot.com>