Example

> a = rand(3,4)
 a =
        1      0.333      0.665      0.167
    0.975     0.0369     0.0847      0.655
    0.647      0.162      0.204      0.129
> maxi(a)
        1          1          1          2
> a = rand(3,5)
 a =
     0.91      0.265     0.0918      0.915      0.924
    0.112        0.7      0.902      0.441     0.0882
    0.299       0.95       0.96     0.0735      0.908
> maxi(a)
        1          3          3          1          1
> maxi(a')
        5          3          3