how to duplicate rows in a 2D matrix

hello everyone, for example I have an array like the one below, I want to duplicate the array value on row 2nd to the value on row 1st does anyone know the easy way? I have tried the code below but it still has an error, thank you

 A = magic(4);
 A(2,:) = [1,:];
 end

Answer 1

[KSSV]

 A = magic(4);
 A(2,:) = A(1,:)

A = 4×4

16 2 3 13 16 2 3 13 9 7 6 12 4 14 15 1

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