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


On Feb 17, 8:40 am, Gregory Lypny <gregory.ly... at videotron.ca> wrote:
> 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

Try this

In[12]:= X = {{1, 2, 3}, {8, NA, 20}, {-7, 9, NA}};

In[13]:= Select[X, ! FreeQ[#, NA] &]

Out[13]= {{8, NA, 20}, {-7, 9, NA}}

Sam


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