Re: Dimensions of Array

From: Darren E. Mason (stcalvin_at_comcast.net)
Date: 08/04/04 

Date: Wed, 04 Aug 2004 15:06:00 GMT

The standard is to refer to a matrix/array as an m x n array, where m is the
number of rows and n is the number of columns. So in your case, that would
be
a 3 x 4 array.

Darren E. Mason

"Tim Brauch" <RnEeMwOs.pVoEst@tbrauch.cNOoSPAMm> wrote in message
news:sat1h0hakg11nl77lu222iqjrtd1874gh9@4ax.com...
> What would you say are the dimensions of the following array:
>
> * * * *
> * * * *
> * * * *
>
> I am working with 4th and 5th grade teachers as part of an NSF GK-12
> fellowship. One of my roles is that of a "professional mathematician"
> to answer questions the teachers have about math.
>
> In the 4th grade text the array is named in ROWxCOLUMN format (the same
> way the dimensions of matrices are labelled). The above array would be
> 3x4. In the 5th grade text, arrays are named by the ACROSSxUP format
> (similar to cartesian coordinates) and the above array would be a 4x3.
>
> The teachers are trying to be consistent and want to know which method
> they should model. I told them to be sure to explain to the kids that
> with either convention, a 3x4 and 4x3 array are congruent or similar,
> but not quite equal.
>
> Any thoughts?
>
> --
> Timothy M. Brauch
> NSF Fellow
> Department of Mathematics
> University of Louisville
>
> email is:
> news (dot) post (at) tbrauch (dot) com
> 

-- 
submissions: post to k12.ed.math or e-mail to k12math@k12groups.org
private e-mail to the k12.ed.math moderator: kem-moderator@k12groups.org
newsgroup website: http://www.thinkspot.net/k12math/
newsgroup charter: http://www.thinkspot.net/k12math/charter.html

Relevant Pages

  • Re: Gaussian cluster antenna array data
    ... A gaussian array is aimed towards resonant elements in cluster form. ... but these dimensions have not been ...
    (rec.radio.amateur.antenna)
  • RE: Mass Adding Comments
    ... insert code to fill your own array as desired at the beginning of the ... 'Determine number of dimensions in array using Chip Pearson's method ... ' Loop, increasing the dimension index Ndx, until an error occurs. ... 'Exit sub if dimensions do not match ...
    (microsoft.public.excel.programming)
  • Re: Gaussian cluster antenna array data
    ... A gaussian array is aimed towards resonant elements in cluster form. ... but these dimensions have not been ...
    (rec.radio.amateur.antenna)
  • RE: Mass Adding Comments
    ... insert code to fill your own array as desired at the beginning of the ... 'Determine number of dimensions in array using Chip Pearson's method ... ' Loop, increasing the dimension index Ndx, until an error occurs. ... 'Exit sub if dimensions do not match ...
    (microsoft.public.excel.programming)
  • Re: Handling ubound on an uninitialised array
    ... Function ArrDim(vArr As Variant) As Integer ... Dim i As Long, x As Long ... > I believe that Tushar's comment re an UPPERBOUND of -1 may relate> to some functions like split/filter or a scripting dictionary's items> array which return an array if no results were found. ... > I've just written following function which gives the DIMENSIONS of an> array. ...
    (microsoft.public.excel.programming)
Quantcast