Re: select 1st column element based on criteria in 2nd AND 3rd column

• To: mathgroup at smc.vnet.net
• Subject: [mg124525] Re: select 1st column element based on criteria in 2nd AND 3rd column
• From: Bob Hanlon <hanlonr357 at gmail.com>
• Date: Sun, 22 Jan 2012 07:27:46 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

pairs = {{1, 3, 4}, {2, 4, 6}, {3, 6, 7}, {4, 1, 8}, {5, 3, 9}, {6, 2,
10}, {7, 5, 11}, {8, 2, 13}, {2, 3, 4}, {5, 6, 7}};

Select[pairs, 5 >= #[[2]] >= 3 && 10 >= #[[3]] >= 7 &]

{{5, 3, 9}}

Select[pairs, And[5 >= #[[2]] >= 3 , 10 >= #[[3]] >= 7] &]

{{5, 3, 9}}

Bob Hanlon

On Sat, Jan 21, 2012 at 5:20 AM, hanciong awesome <hanciong at gmail.com> wrote:
> Hello all, suppose I have a table:
>
> pairs = {{1, 3, 4}, {2, 4, 6}, {3, 6, 7}, {4, 1, 8}, {5, 3, 9}, {6, 2,
>    10}, {7, 5, 11}, {8, 2, 13}, {2, 3, 4}, {5, 6, 7}}
>
> how to select rows for which the 2nd column is between 3 and 5, AND
> the 3rd column is between 7 and 10? So I want to do something similar
> to this:
>
> Select[pairs, 5 >= #[[2]] >= 3 &  AND  10 >= #[[3]] >= 7]
>
> but I just couldn't get it to work. what should I do? Thank you
>

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