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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: how to print an array range?
Date: Tue, 26 Jun 2012 16:13:47 -0700
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Date: 2012-06-26T16:13:47-07:00
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On 06/26/2012 03:30 PM, Dennis Lee Bieber wrote:
>>
> 	It could simplify the mapping of real-world coordinates to a scaled
> integer coordinate frame when negative coordinates are permitted.

The type in question, Real_Matrix, is intended to model mathematical matrices, 
not to be a general-purpose array. The only definitions I've seen of 
mathematical matrices look like

An MxN matrix X is defined as

     +-                      -+
     |x(1,1) x(1,2) ... x(1,N)|
X = |x(2,1) x(2,2) ... x(2,N)|
     |...                     |
     |x(M,1) x(M,2) ... x(M,N)|
     +-                      -+

except the indices are subscript, not in parentheses. In other words, a lower 
bound of 1 is part of the definition of a matrix.

Of course, I'm not a mathematician, so I might be mistaken.

-- 
Jeff Carter
"People called Romanes, they go the house?"
Monty Python's Life of Brian
79



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