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Topic: How do I use Select[list,condition]?
Replies: 7   Last Post: Aug 2, 1996 2:04 AM

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Wolfram Jr.

Posts: 2
Registered: 12/11/04
Re: How do I use Select[list,condition]?
Posted: Jul 30, 1996 3:06 AM
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In article <4thatm$j6e@dragonfly.wolfram.com>, welter@texoma.com (Jason
Welter) wrote:

> I have a list that looks like:
>
> data = {{1,1,a,4,5,6},{2,1,a,2,3,4},{3,1,a,7,8,9},
> {1,2,b,4,5,6},{2,2,b,2,3,4},{3,2,b,7,8,9},
> {1,3,c,4,5,6},{2,3,c,2,3,4},{3,3,c,7,8,9}}
>
> and I want to pick out the lists that have a 2 as the second element
> of the list. I tried something like:
>
> data1 = Select[data,data[[#,2]]==2];
>
> but this doesn't work. How do I do it?


Like this:

Select[data, #[[2]]==2&]

the "&" makes it a `pure' function

Wjr

--
}.
`\
I only exist in interaction







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