[Haskell-cafe] Simple matrix

[Atila Romero]

Good point.

And there is another problem: one could expect
10 * [[1,2],[3,4]] to be equal to [[10,20],[30,40]]
and in this case 10 should be equal to [[10,0],[0,10]], instead of 
[[10,10],[10,10]] or [[10]].

I dont see how to fix this.
Could be better to forget about fromInteger...

Atila

Jared Updike wrote:
>>   fromInteger x = [[fromInteger x]]
>
> Wouldn't you want the expression
>
> [[1,0],[0,2]] + 10
>
> to yield
>
> [[11,10],[10,12]]
>
> instead of [[11]] ? I guess you would need some complicated machinery
> so this is one thing you have to ignore to keep your otherwise nifty
> instance nice and simple.
>
>  Jared.


		
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