Re: Summing all the elements along a dimension in a matrix

*To*: mathgroup at smc.vnet.net*Subject*: [mg104303] Re: [mg104288] Summing all the elements along a dimension in a matrix*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Tue, 27 Oct 2009 04:57:25 -0500 (EST)*References*: <200910260425.XAA18560@smc.vnet.net>*Reply-to*: murray at math.umass.edu

A matrix is 2-dimensional and has no "third dimension". Are you trying to sum along the 3rd row? Along the 3rd column? Or are you talking about a higher-dimensional array? CuppoJava wrote: > Hi, > I just started using Mathematica after a year of experience with > another system, and I have a question regarding how to handle matrices. > > What is the equivalent code for doing > sum(A,3) in mathematica? > This sums all the elements A along the third dimension. > > I'm having a hard time finding it in the documentation. > > Thanks a lot for your help > -Patrick > -- 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

**References**:**Summing all the elements along a dimension in a matrix***From:*CuppoJava <patrickli_2001@hotmail.com>