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Re: Select All Lists Where Any Element is a Given Value

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96616] Re: [mg96586] Select All Lists Where Any Element is a Given Value
  • From: Adriano Pascoletti <adriano.pascoletti at dimi.uniud.it>
  • Date: Tue, 17 Feb 2009 06:26:53 -0500 (EST)
  • References: <200902162140.QAA16030@smc.vnet.net>

In[1]:= X = {{1, 2, 3}, {8, NA, 20}, {-7, 9, NA}};

In[2]:= Select[X, MemberQ[#1, NA] & ]
Out[2]= {{8, NA, 20}, {-7, 9, NA}}


In[3]:= Cases[X, {___, NA, ___}]
Out[3]= {{8, NA, 20}, {-7, 9, NA}}


Adriano Pascoletti

2009/2/16 Gregory Lypny <gregory.lypny at videotron.ca>

> Hello everyone,
>
> Suppose I have the list
>
>        X = {{1, 2, 3}, {8, NA, 20}, {-7, 9, NA}},
>
> where NA is a string, although it need not be.  How can I use Select
> to pull out all lists in X where NA appears in any element?  In this
> example, I want to pull out the second and third list.
>
>                Regards,
>
>                        Gregory
>
>
>



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