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Re: real newbie question

  • To: mathgroup at
  • Subject: [mg64411] Re: [mg64396] real newbie question
  • From: Sseziwa Mukasa <mukasa at>
  • Date: Thu, 16 Feb 2006 03:05:18 -0500 (EST)
  • References: <>
  • Sender: owner-wri-mathgroup at

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


and for the second




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