surf(xi,yi,zi_spline); title('三次样条插值'); subplot(2,3,4); surf(xi,yi,zi_cubic); title('三次多项式插值'); figure; %新开绘图窗口 subplot(2,2,1); contour(xi,yi,zi_nearest); title('最邻近插值'); subplot(2,2,2); contour(xi,yi,zi_linear); title('线性插值'); subplot(2...