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Re: DeleteCases and multiple patterns

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93960] Re: [mg93936] DeleteCases and multiple patterns
  • From: "David Park" <djmpark at comcast.net>
  • Date: Sun, 30 Nov 2008 06:57:01 -0500 (EST)
  • References: <28970806.1227951410783.JavaMail.root@m02>

Use Alternatives. The vertical bar above the '\' character on the keyboard.

DeleteCases[mylist,{2,_,_}|{3,_,_}]


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark 



From: guerom00 [mailto:guerom00 at gmail.com] 

Hello everyone :)

I have, say a list of list. Each element is a list of length 3 i.e.

myList={{x1,y1,z1},{x2,y2,z2},...{xN,yN,zN}}

Now, let's say I want to delete from this list the element which have
x=2 and 3 using DeleteCases.
This works :

DeleteCase[myList,{2,_,_}]
DeleteCases[myList,{3,_,_}]

but I would like to use

DeleteCases[myList,{{2,_,_},{3,_,_}}]

and this does not work...

How do I combine multiple patterns in DeleteCases ?

Thanks in advance.




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