To draw a 3D robot using the line function in Matlab, first create a figure window using the figure command. Then use the line function to draw each part of the robot by specifying the x, y, and z coordinates of each endpoint of the line. Here is an example code that draws a simple 3D robot:
% Set up the figure window
figure;
xlim([-10 10]);
ylim([-10 10]);
zlim([0 20]);
view(3);
grid on;
hold on;
% Draw the robot
line([-2 -2],[0 0],[0 12],'Color','blue','LineWidth',5); % torso
line([-2 -5],[0 0],[12 12],'Color','red','LineWidth',3); % left arm
line([-2 1],[0 0],[12 12],'Color','red','LineWidth',3); % right arm
line([-2 -2],[0 -3],[0 0],'Color','green','LineWidth',3); % left leg
line([-2 -2],[0 3],[0 0],'Color','green','LineWidth',3); % right leg
line([-2 -2],[-3 -5],[0 0],'Color','cyan','LineWidth',3); % left foot
line([-2 -2],[3 5],[0 0],'Color','cyan','LineWidth',3); % right foot
% Label the axes
xlabel('X-axis');
ylabel('Y-axis');
zlabel('Z-axis');
title('3D Robot');
This code produces a 3D robot with a blue torso, red arms, green legs, and cyan feet. You can adjust the coordinates and colors to create different robot designs.