Re: List vs. array in Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg132576] Re: List vs. array in Mathematica*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Sun, 13 Apr 2014 05:27:17 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <20140412091439.6C8C069D4@smc.vnet.net>

The function Array does _not_ necessarily a list of uniform depth. For example: f[n_] := Nest[List, x, n] Array[f, 5] (* {{x}, {{x}}, {{{x}}}, {{{{x}}}}, {{{{{x}}}}}} *) However, the function ArrayQ does not return True for a "ragged" array but only she "all parts at a particular level must be lists of the same length. On Apr 12, 2014, at 5:14 AM, andymhancock at gmail.com wrote: > In mathematica, is an array simply a list of uniform depth? Both terms are used in the documentation, but I haven't run across an explicit explanation of why two terms are needed for the same construct. So I'm wondering if their relationship is. > Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 240 246-7240 (H) University of Massachusetts 710 North Pleasant Street Amherst, MA 01003-9305

**References**:**List vs. array in Mathematica***From:*andymhancock@gmail.com