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
>
>
>
- References:
- Select All Lists Where Any Element is a Given Value
- From: Gregory Lypny <gregory.lypny@videotron.ca>
- Select All Lists Where Any Element is a Given Value