2's complement of a row in a matrix

Hi. For a = [m n] matrix, where each element value is 0 or 1. I want to get the 2's complement of rows depending on the first element value of a row. If a(m,1) = 1, then 2's complement will be performed.

How this 2's complement operation can be performed?

Any advice would be appreciated.

[Andrei Bobrov]

read http://en.wikipedia.org/wiki/Two%27s_complement

Answer 1

[Walter Roberson]

To construct the twos-complement of a binary vector, do a bit-wise negation of the vector, and then undertake the steps necessary to add 1 to the end of the vector, propagating any carry "left-ward" until there is no carry remaining.

[Jan]

Thanks, Walter. I've removed my answer.

[Ayesa]

Thank you for your suggestion. It helps me to write the code. Again many thanks.