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From: "Nasser M. Abbasi" <nma@12000.org>
Newsgroups: comp.lang.ada
Subject: Re: Arrays in Ada 2020
Date: Sat, 17 Jun 2017 22:00:10 -0500
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Xref: news.eternal-september.org comp.lang.ada:46974
Date: 2017-06-17T22:00:10-05:00
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On 6/17/2017 9:14 PM, Ivan Levashev wrote:
> Hello!
> 
> FYI Ada 2020 is about to bring some improvements:
> 
> http://www.ada-auth.org/standards/2xrm/html/RM-4-3-3.html
> 
>> G : constant Matrix :=
>>      (for I in 1 .. 4 =>
>>         (for J in 1 .. 4 =>
>>            (if I = J then 1.0 else 0.0))); -- Identity matrix
> 
> Best Regards,
> Ivan Levashev,
> Barnaul

That is nice. But still too much code for such common operation.
In Matlab the same can be  done using just

     eye(4)          % Identity matrix

For other languages

https://rosettacode.org/wiki/Identity_matrix

--Nasser