How to reshape matrix in Matlab

I have matrix A as follows:

A = [98  3  2  7
99  4  1  4
100  5  12  3
101  6  4  2
102  7  6  1
];

I want to transfer matrix A to the following format:

B = [98  3
99  4
100  5
101  6
102  7
98  2
99  1
100  12
101  4
102  6
98  7
99  4
100  3
101  2
102  1
];

% from matrix A, col 3:4 are written under the second column and first colum is repeated.

Answer 1

[Star Strider]

This works:

A = [98  3  2  7
    99  4  1  4
    100  5  12  3
    101  6  4  2
    102  7  6  1];

B = [repmat(A(:,1), size(A,2)-1, 1)  reshape(A(:,2:end), [],1)]

B =
    98     3
    99     4
   100     5
   101     6
   102     7
    98     2
    99     1
   100    12
   101     4
   102     6
    98     7
    99     4
   100     3
   101     2
   102     1