matrix

[Laurent MICHEL]

Mark,

To me, a (N,M) matrix is a 2D matrix with N rows and M columns (e.g. a 
pixel array).
You want to model a ND matrix, you have to set N (matrix dimension) as 
an attribute plus an array of N values giving the size along of each 
individual axis.
If you want to specifically model a 2D matrix, it would be better have 2 
attributes with a non confusing names (e.g. columns, rows)

Laurent

Le 02/04/2020 à 16:47, CresitelloDittmar, Mark a écrit :
> Not sure I follow.  Wouldn't a Matrix2D be a Matrix with M=2, N=2?
> We could discuss the names, but these seemed pretty standard and are 
> described as M rows, N columns.  I know I always have to go back and 
> review which way is rows and which is columns, but I don't deal with 
> matrices very often.
> 
> 
> 
> On Thu, Apr 2, 2020 at 8:50 AM Laurent MICHEL 
> <laurent.michel at astro.unistra.fr 
> <mailto:laurent.michel at astro.unistra.fr>> wrote:
> 
>     Dear,
> 
>     Comment #3:
> 
>     - The matrix operation class (Matrix) seems to refer to a 2D matrix.
>     The
>     class could be renamed Matrix2D to keep room for future high
>     dimensionality classes
> 
>     - The matrix dimensions are named N and M. Personally, I'm pretty sure
>     to always confuse N.M and M.N. It could be safer to renamed these
>     attributes with something more expressive like (row, columns)
> 
>     LM
>     -- 
>     -- 
>     ---- Laurent MICHEL              Tel  (33 0) 3 68 85 24 37
>            Observatoire de Strasbourg  Fax  (33 0) 3 68 85 24 32
>            11 Rue de l'Universite      Mail
>     laurent.michel at astro.unistra.fr <mailto:laurent.michel at astro.unistra.fr>
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>     ---
> 

-- 
---- Laurent MICHEL              Tel  (33 0) 3 68 85 24 37
      Observatoire de Strasbourg  Fax  (33 0) 3 68 85 24 32
      11 Rue de l'Universite      Mail laurent.michel at astro.unistra.fr
      67000 Strasbourg (France)   Web  http://astro.u-strasbg.fr/~michel
---