Re: proper way to manipulate lists?
- To: mathgroup at smc.vnet.net
- Subject: [mg40192] Re: [mg40182] proper way to manipulate lists?
- From: Adriano Pascoletti <pascolet at dimi.uniud.it>
- Date: Tue, 25 Mar 2003 14:47:51 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Nathan,
data2=data . DiagonalMatrix[{a,b}]
Adriano Pascoletti
Marted=EC, 25 Mar 2003, alle 09:04 Europe/Rome, Nathan Moore ha scritto:
>
> 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
>
>
>