How can i circle shift certain elements of two arrays simultaneously?

i have an array

 M=[ 1     1     1     2     2     2     3     3     3     4     4     4     5     5     5     5     5     6     6     6     6]

and another array

N=[

   10    20    40    59    66     4     5     7     8    90    44    56    76    58    24    16    13    21     9    85    36
    13    15    61    42    32    52    18    17    76    65    24    32    20     5     9    48     7    56    30    40    55]

note that each column of N(2,24) array is mapped to the identical element in M(1,24). now I want to circle shift all the elements 6 in N array as M=[ 6 6 6 6 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 5 5 ] and simultaneously circle shift the corresponding columns in N array. can anyone please help me.

thank you

Answer 1

[Fangjun Jiang]

circshift(M,4) and circshift(N,4) where 4 is the same.