MATLAB: How to flip a general square matrix ( it could have even or odd number of rows/cols ) from it’s center in matlab

flippingMATLABmatrix

hi all
I have a general matrix , I want to flip the last half of it starting from it's center in matlab
To be clear ,I attach an image
I try the following 
A=[1,2,3,4,5;6,7,8,9,10;11,12,13,14,15;16,17,18,19,20;21,22,23,24,25]
num_of_row=length(A(:,1))
if( mod(2,num_of_row)==0)
    k=M/2;
else
    k=(M-1)/2;
end
fliplr(A)
flip.jpeg

Best Answer

>> M = [1,2,3,4,5;2,6,7,9,10;3,7,11,12,13;4,9,12,16,20;8,10,13,20,25]
M =
    1    2    3    4    5
    2    6    7    9   10
    3    7   11   12   13
    4    9   12   16   20
    8   10   13   20   25
>> X = [5,4,1,2,3]; 
>> Z = M(X(end:-1:1),X)
Z =
   13   12    3    7   11
   10    9    2    6    7
    5    4    1    2    3
   20   16    4    9   12
   25   20    8   10   13
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