adding a row to a Mat matrix

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Hi!I am using opencv and c++. I am trying to add a row of 1's in the last row of a matrix. When I display the matrix of the Mat object in command line,it displays everything like this http://i.imgur.com/JFb49of.jpg,where (55,118) is the first coordinate obtained,(24,56) is the second coordinate and (52,26) is the 3rd coordinate. What I need is a matrix which is displayed column wise where (55,118),(24,56) and (52,26) are displayed column wise with their last rows having a 1. My problem is I cannot get the formatting right. Can anyone help please?Thanks