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Re: Dynamically create Select criteria

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125405] Re: Dynamically create Select criteria
  • From: Bob Hanlon <hanlonr357 at gmail.com>
  • Date: Mon, 12 Mar 2012 04:09:14 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201203091110.GAA26899@smc.vnet.net>

data = {
   {"Fido", "dog", 8},
   {"Sparky", "dog", 2},
   {"Shadow", "cat", 1},
   {"Cuddles", "cat", 3},
   {"Cutey", "rabbit", 1}};

types = Union[data[[All, 2]]];

ages = Union[data[[All, 3]]];

Manipulate[selection = Select[data,
   (age != {} || type != {}) &&
     (age != {} && type == {} ||
       MemberQ[type, #[[2]]]) &&
     (type != {} && age == {} ||
       MemberQ[age, #[[3]]]) &],
 {{type, {}, Style["Type", Blue, 12]}, types},
 {{age, {}, Style["Age", Blue, 12]}, ages},
 ControlType -> CheckboxBar]

Dynamic[selection]


Bob Hanlon


On Fri, Mar 9, 2012 at 6:10 AM, Jack McInerney <ejmcinerney at gmail.com> wrote:
> I have a database in the form of a big list, and want to select a
> subset of this list, by allowing the user to click on checkboxes.  The
> example below shows the idea.  Given a list of animals, lets say I
> want to select all the cats that are 1 year old, or all of the dogs
> and cats.  I can't figure out how to use the output of my checkboxes
> to dynamically create a selection criteria for the Select function.
> Is this possible?  Any thoughts would be appreciated.
>
> data={{"fido", "dog",8},
> {"Sparky", "dog",2},
> {"Shadow", "cat",1},
> {"Cuddles", "cat",3},
> {"Cutey", "rabbit",1}};
>
> CheckboxBar[Dynamic[type], DeleteDuplicates[data[[All,2]] ]]
>
> CheckboxBar[Dynamic[age], Sort[DeleteDuplicates[data[[All,3]] ]]]
>
> Dynamic[Select[data, #[[2]]==type[[1]] && #[[3]]==age[[1]]&]]  (*<--
> criteria should depend on which boxes have been checked by user *)
>
>
> Thanks,
> Jack



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