[Tutor] Unity matrix

[Stuart Murdock]

Hi Danny,


Danny Yoo wrote:

>On Tue, 28 Sep 2004, Stuart Murdock wrote:
>
>  
>
>>Does anyone know if there is a builtin to numarray (or an add on ) to
>>give me a unity matrix. It would look better than trying to add ones
>>along the diagonal of a zeros.
>>    
>>
>
>Hi Stuart,
>
>
>You're probably looking for the identity() function:
>
>###
>  
>

Brilliant, thats exactly what I am looking for.

Stuart

>>>>numarray.identity(5)
>>>>        
>>>>
>array([[1, 0, 0, 0, 0],
>       [0, 1, 0, 0, 0],
>       [0, 0, 1, 0, 0],
>       [0, 0, 0, 1, 0],
>       [0, 0, 0, 0, 1]])
>###
>
>Numarray has extensive documentation --- you can find more information on
>the array-generating functions here:
>
>    http://stsdas.stsci.edu/numarray/Doc/node22.html#l2h-36
>
>
>.
>
>  
>


-- 

Stuart Murdock Ph.D,
Research Fellow,
Dept. of Chemistry / E-Science,
University of Southampton,
Highfield, Southampton,
SO17 1BJ, United Kingdom
 
http://www.biosimgrid.org