清空环境变量clcclear 生成训练数据与预测数据训练数据A=49491;麦克风A的坐标B=49511;麦克风B的坐标C=51511;麦克风C的坐标D=50502;麦克风D的坐标x=05195;y=05195;用100组数据训练x=050510;y=050510;用400组数据训练XY=meshgridxy;

Z=sqrt((X-A(1)).^2+(Y-A(2)).^2+A(3)^2)+sqrt((X-B(1)).^2+(Y-B(2)).^2+B(3)^2)-sqrt((X-C(1)).^2+(Y-C(2)).^2+C(3)^2)-sqrt((X-D(1)).^2+(Y-D(2)).^2+D(3)^2); %%%预测数据 x_test=5;y_test=5;%%%测试数据为（5，5） Z_test=sqrt((x_test-A(1)).^2+(y_test-A(2)).^2+A(3)^2)+sqrt((x_test-B(1)).^2+(y_test-B(2)).^2+B(3)^2)-sqrt((x_test-C(1)).^2+(y_test-C(2)).^2+C(3)^2)-sqrt((x_test-D(1)).^2+(y_test-D(2)).^2+D(3)^2); %% 数据可视化 figure(1) mesh(X,Y,Z) hold on plot3(A(1),A(2),A(3),'ro','MarkerSize',10,'LineWidth',2) plot3(B(1),B(2),B(3),'bo','MarkerSize',10,'LineWidth',2) plot3(C(1),C(2),C(3),'go','MarkerSize',10,'LineWidth',2) plot3(D(1),D(2),D(3),'ko','MarkerSize',10,'LineWidth',2) xlabel('x') ylabel('y') zlabel('z') title('Training Data') hold off

figure(2) contour(X,Y,Z) hold on plot(A(1),A(2),'ro','MarkerSize',10,'LineWidth',2) plot(B(1),B(2),'bo','MarkerSize',10,'LineWidth',2) plot(C(1),C(2),'go','MarkerSize',10,'LineWidth',2) plot(D(1),D(2),'ko','MarkerSize',10,'LineWidth',2) plot(x_test,y_test,'rx','MarkerSize',10,'LineWidth',2) xlabel('x') ylabel('y') title('Contour Map of Training Data and Test Data') hold of