Re: select 1st column element based on criteria in 2nd AND 3rd column
- To: mathgroup at smc.vnet.net
- Subject: [mg124705] Re: select 1st column element based on criteria in 2nd AND 3rd column
- From: Hanciong hanciong <hanciong at gmail.com>
- Date: Wed, 1 Feb 2012 03:51:11 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Thank you for your effort guys. yes I realize there is no AND in
mathematica, that's why I am asking the correct way (syntax) to do it.
On Sat, Jan 21, 2012 at 9:08 PM, DrMajorBob <btreat1 at austin.rr.com> wrote:
> Legal syntax is helpful:
>
>
> 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}}
>
> Cases[pairs, {a_, b_, c_} /; 3 <= b <= 5 && 7 <= c <= 10]
>
> {{5, 3, 9}}
>
> Bobby
>
>
> On Sat, 21 Jan 2012 04:20:05 -0600, 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
>>
>>
>
> --
> DrMajorBob at yahoo.com
>