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Re: How to select only points which are inside a domain

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124994] Re: How to select only points which are inside a domain
  • From: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>
  • Date: Fri, 17 Feb 2012 06:22:10 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hi,

I have a list of points: pntL={Point[x1,y1,z1],...}. How to select only

points which are inside a domain {xmin,xmax,ymin,ymax,zmin,zmax}?

Thanks in advance,

--Ted



Hi, Ted,



Try the following. This makes your list:



lst=Table[{RandomReal[{-5,5}],RandomReal[{-5,5}],RandomReal[{-5,5}]},{250}];



It yields figures distributed between -5 and 5. Assume further that your domain (from which we only should select) is a cube in the origin with the unit size. Then try this:



Select[lst,-1<#[[1]]<1&&-1<#[[2]]<1&&-1<#[[3]]<1&]



Have fun, Alexei



Alexei BOULBITCH, Dr., habil.

IEE S.A.

ZAE Weiergewan,

11, rue Edmond Reuter,

L-5326 Contern, LUXEMBOURG



Office phone :  +352-2454-2566

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e-mail: alexei.boulbitch at iee.lu<mailto:alexei.boulbitch at iee.lu>








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