Re: Is there any efficient easy way to compare two lists with the same length with Mathematica?
- To: mathgroup at smc.vnet.net
- Subject: [mg124384] Re: Is there any efficient easy way to compare two lists with the same length with Mathematica?
- From: Murray Eisenberg <murray at math.umass.edu>
- Date: Wed, 18 Jan 2012 05:57:04 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Over time more and more things like this have been extended to work automatically on lists. But so far, as you discovered, not GreaterEqual (nor Greater, etc.). Here's one way without explicitly using Table: a = RandomInteger[{0, 20}, 5]; b = RandomInteger[{0, 20}, 5]; And @@ MapThread[Greater, {a, b}] The key there is MapThread, which does what you (and I) would evidently like Mathematica to do automatically -- in effect, to make GreaterEqual have Listable as an Attribute. On 1/17/12 3:34 AM, Rex wrote: > Given two lists `A={a1,a2,a3,...an}` and `B={b1,b2,b3,...bn}`, I would > say `A>=B` if and only if all `ai>=bi`. > > There is a built-in logical comparison of two lists, `A==B`, but no > `A>B`. > Do we need to compare each element like this > > And@@Table[A[[i]]>=B[[i]],{i,n}] > > Any better tricks to do this? > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305
- Follow-Ups:
- Re: Is there any efficient easy way to compare two lists with the same length with Mathematica?
- From: Andrzej Kozlowski <akoz@mimuw.edu.pl>
- Re: Is there any efficient easy way to compare two lists with the same length with Mathematica?