a = 
         1.0     1.0     5.0
         2.0     2.0     6.0
         3.0     3.0     7.0
         4.0     4.0     8.0

Sum along the first dimension = 
        10.0    10.0    26.0

Sum along the second dimension = 
         7.0    10.0    13.0    16.0

Maximum along the first dimension = 
         4.0     4.0     8.0

Maximum along the second dimension = 
         5.0     6.0     7.0     8.0

Minimum along the first dimension = 
         1.0     1.0     5.0

Minimum along the second dimension = 
         1.0     2.0     3.0     4.0

Circular Shift up 2 along the 1st dimension = 
         3.0     4.0     1.0     2.0
         3.0     4.0     1.0     2.0
         7.0     8.0     5.0     6.0

Circular shift up 1 along the 2nd dimension = 
         5.0     6.0     7.0     8.0
         1.0     2.0     3.0     4.0
         1.0     2.0     3.0     4.0