Just add an extra column to your data, then set as the Data property of the uitable.
After you are done with the updates, retreive the Data property to see what was selected.
% change yourdata to your variable name . type is table
yourdata.lastcol = false(height(yourdata),1);
f = uifigure('CloseRequestFcn',@(varargin)uiresume(gcbf));
editcols = false(1,width(yourdata));
editcols(end) = true;
t = uitable(f,'Data',yourdata,'ColumnEditable',editcols);
uiwait(f); % this will block until the figure is closed.
updatedata = t.Data;
close(f);
delete(f);
