str = ' ';

str1 = '\n';

string1 = [num2str(Ma(1,1)),str,num2str(Ma(1,2)),str,num2str(Ma(1,3))];

string2 = [num2str(Ma(2,1)),str,num2str(Ma(2,2)),str,num2str(Ma(2,3))];

string3 = [num2str(Ma(3,1)),str,num2str(Ma(3,2)),str,num2str(Ma(3,3))];

figure('units','normalized','position',[0.2 0.2 0.2 0.2]);

h=uicontrol('Style','Text','fontsize',16);

 string = { string1,...

            string2,...

            string3};

[outstring,newpos]=textwrap(h,string); %控制换行

set(h,'String',outstring,'Position',newpos);