Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: real newbie question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg64411] Re: [mg64396] real newbie question
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Thu, 16 Feb 2006 03:05:18 -0500 (EST)
  • References: <200602150832.DAA06538@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On Feb 15, 2006, at 3:32 AM, Skip Egley wrote:

> Sorry for the newbieness. This is probably a piece of cake for you  
> folks.
>
> I have a set of Brillouin zone data. That is, there's a kx, ky, and  
> a kz followed by an energy value. How can I select particular  
> directions in the Brillouin zone out of this data and make a 2D  
> plot of it. A k value followed by an energy value. For instance,  
> say I want to plot along the kx axis. I would need to select all kx  
> values such that ky and kz were zero and grab the matching energy  
> value for the kx value. Or if I wanted to plot along a (110)  
> direction, I would need to grab all kx=ky values with kz=0, along  
> with the corresponding energy. Get my drift?

Assuming your data is in the form {{kx1,ky1,kz1,E1}, 
{kx2,ky2,kz2,E2},...} you can use Select and Map, for the first case

{#[[1]],#[[4]]}&/@Select[data,#[[2]]==#[[3]]==0&]

and for the second

{#[[1]],#[[4]]}&/@Select[data,#[[1]]==#[[2]]&&#[[3]]==0&]

Regards,

Sseziwa


  • Prev by Date: Re: Using a text editor like interface for Mathematica?
  • Next by Date: Re: Question about ScaleFunction in PlotVectorField (using PureFunction)
  • Previous by thread: real newbie question
  • Next by thread: Re: real newbie question