Re: doubt in matrix_type help

[David Bateman]

Jorge Barros de Abreu wrote:

> Hi for All.
>
> Anyone, please, send to me tree matrices in a .m file of the type "banded" and 
> say to me what is "nl" and "nu" like in help file. 

nl is the number of sub-diagonal bands and nu is the number of
super-diagonal bands.


> And also a example of 
> "tridiagonal" matrix.
>  
tridiagonal is a banded matrix where nl=nu=1, there are special routines
to treat this sub case in LAPACK which are faster, which is the sole
interest of making this distinction.

D.


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