The Matrix to end all Matrix classes (Let's dream!)

[Bill Baxter]

0ffh wrote:
> 
> Hi, regarding the organisation of matrices maybe it'd pay to take a look 
> at how Lush is doing them, as it's designed (and known) to do them quite 
> well.
> I'll quote from the Lush tutorial:
> 
> Matrices are really composed of two separate entities:
> 
>  * the storage or srg which contains the following fields: a pointer to the
> actual data , an element type identifier (and the size thereof) , and flags
> that indicate if the data is writable or not , if it is in RAM or
> memory-mapped from a file.
> 
>  * the index or idx points to a srg and contains the following fields: 
> the number of dimensions of the tensor , the size in each dimension , 
> the address increment from one element to the next in each dimension 
> (called modulo ) , and the offset of the first tensor element in the 
> storage . This structure allows multiple idx to point to the same srg 
> thereby allowing the data to be accessed in multiple ways without copying.
> 

That sounds like the way NumPy in python does it too.  And maybe Blitz++ 
as well?

--bb