已知N行三列矩阵如何用matlab绘制空间曲面图答:4];y=[2,2,2,3,3,3,4,4,4];z=[80,82,84,79,61,65,84,84,86];subplot(2,1,1);stem3(x,y,z);title('RAW DATA');xi=0:0.1:4;yi=2:0.2:4;[XI,YI]=meshgrid(xi,yi);ZI=griddata(x,y,z,XI,YI,'v4');subplot(2,1,2);mesh(XI,YI,ZI);title('GRIDDATA');...