Re: simple question about removing elements from a table
- To: mathgroup at smc.vnet.net
- Subject: [mg122389] Re: simple question about removing elements from a table
- From: János Löbb <janos at lobb.com>
- Date: Thu, 27 Oct 2011 06:30:34 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201110262137.RAA29967@smc.vnet.net>
A newbie approach would be: datasubset=Select[data,#[[1]]<0&] J=E1nos On Oct 26, 2011, at 5:37 PM, Michael B. Heaney wrote: > Hi, > > I have a data table: > > data={{-0.5, 0.0321787}, {-0.489, 0.0321691}, {-0.478, > 0.032211}, {-0.467, 0.0321723}, {-0.456, 0.0322448}, {-0.444, 0.0321498}, > {-0.433, 0.032132}, {-0.422, 0.0321804}, {-0.411, 0.0322158}, > {-0.4, 0.0320886}, {-0.233, 0.0320596}, {0.567, 0.00286087}, {0.578, > -0.00143633}, {0.589, -0.00592979}, {0.6, -0.0113609}} > I want to remove all of the elements that have a positive first number, to > get: > > datasubset={{-0.5, 0.0321787}, {-0.489, 0.0321691}, {-0.478, > 0.032211}, {-0.467, 0.0321723}, {-0.456, 0.0322448}, {-0.444, 0.0321498}, > {-0.433, 0.032132}, {-0.422, 0.0321804}, {-0.411, 0.0322158}, > {-0.4, 0.0320886}, {-0.233, 0.0320596}} > > How do I do this? > > Thanks, > > Michael > -- > ------------------------------------------------------------ > Michael B. Heaney > 3182 Stelling Drive > Palo Alto, CA 94303 USA > mheaney at alum.mit.edu > www.linkedin.com/in/michaelbheaney > ------------------------------------------------------------
- References:
- simple question about removing elements from a table
- From: "Michael B. Heaney" <mheaney@gmail.com>
- simple question about removing elements from a table