Example

> a = rand(5,5)
 a =
    0.269      0.737      0.505     0.0321      0.324  
    0.334      0.248      0.529      0.411      0.983  
    0.278       0.45      0.877      0.982      0.734  
    0.789      0.363      0.465      0.686      0.539  
    0.692      0.369      0.806      0.447      0.163  
> sum(a)
     2.36       2.17       3.18       2.56       2.74  
> norm(a)
     3.18
> norm(a,"o")
     3.18
> sum(a')'
     1.87  
     2.51  
     3.32  
     2.84  
     2.48  
> norm(a,"i")
     3.32
> norm(a,"m")
    0.983
> svd(a).sigma
 sigma =
     2.68      0.723      0.606      0.465      0.256  
> norm(a,"2")
     2.68
> sqrt(sum(sum(a.*a)))
     2.89
> norm(a,"f")
     2.89