How to applying miror effect on only last row last column first row first column of image

i have image m, and i want to apply a miror effect on only last row last column first row first column of the matrix of image thanks in advance

[Sivakumaran Chandrasekaran]

follow two steps.. step one.. select the last row last column.. second step.. apply your concept

Answer 1

[Walter Roberson]

I am not sure what you mean by "mirror effect", but perhaps you mean

M = zeros(size(YourArray)+2, class(YourArray));  %one larger in each direction
M(2:end-1,2:end-1) = YourArray;                  %original goes in center
M(1,2:end-1) = YourArray(1,:);                   %copy of top row
M(end,2:end-1) = YourArray(end,:)                %copy of bottom row
M(2:end-1,1) =  YourArray(:,1);                  %copy of first column
M(2:end-1,end) = YourArray(:,end);               %copy of last column
M(1,1) = YourArray(1,1);                         %fill in top left corner
M(1,end) = YourArray(1,end);                     %fill in top right corner
M(end,1) = YourArray(end,1);                     %fill in bottom left corner
M(end,end) = YourArray(end,end);                 %fill in bottom right corner

This could be coded more efficiently, but that can wait until you have figured out if this is even what you want.