Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

[Date Index] [Thread Index] [Author Index]

Search the Archive

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

  • To: mathgroup at smc.vnet.net
  • Subject: [mg124698] Re: select 1st column element based on criteria in 2nd AND 3rd column
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Wed, 1 Feb 2012 03:48:46 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com

You could type the word "and" or "AND" or "And" into Mathematica,  
highlight it, and push the Help key.

Bobby

On Tue, 31 Jan 2012 07:55:38 -0600, Hanciong hanciong <hanciong at gmail.com>  
wrote:

> 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
>>


-- 
DrMajorBob at yahoo.com



  • Prev by Date: Derivative of experimental data
  • Next by Date: Plotter for complex polynomials (complex coefficients)
  • Previous by thread: Re: select 1st column element based on criteria in 2nd AND 3rd column
  • Next by thread: Derivative of experimental data