How to plot this line and specified point
显示 更早的评论
In addition to the point on the graph that shows up, I'd like to also have the line of the equation show up on the graph as well. I have tried using hold on and hold off and a couple other ways, but I cannot figure it out
prompt = 'Time of flight? (s) ';
t = input(prompt);
if (t <= 45)
h = 15*t.^2;
fprintf('Altitude: %dm\n\n', h)
v = 30*t;
fprintf('Velocity: %dm/s\n\n', v);
figure(1)
subplot(2,1,1)
plot(t, h, 'o'), xlabel('Time (s)'), ylabel('Altitude (m)'), title('Altitude vs Time')
subplot(2,1,2)
plot(t, v,'o'), xlabel('Time (s)'), ylabel('Velocity (m/s)'), title('Velocity vs Time')
elseif (t < 117.5)
h = 30375 + (1350*t) + 0.5*(-11.5)*t.^2;
fprintf('Altitude: %dm\n\n', h )
v = 1350 - 11.5*t;
fprintf('Velocity: %dm/s\n\n', v);
figure(2)
subplot(2,1,1)
plot(t, h,'o'), xlabel('Time (s)'), ylabel('Altitude (m)'), title('Altitude vs Time')
subplot(2,1,2)
plot(t, v,'o'), xlabel('Time (s)'), ylabel('Velocity (m/s)'), title('Velocity vs Time')
end
采纳的回答
Davide Masiello
2022-2-4
prompt = 'Time of flight? (s) ';
t = input(prompt);
tx = t-5:t+5;
if (t <= 45)
h = @(x) 15*x.^2;
fprintf('Altitude: %dm\n\n', h(t))
v = @(x) 30*x;
fprintf('Velocity: %dm/s\n\n', v(t));
figure(1)
subplot(2,1,1)
plot(t,h(t),'o',tx,h(tx)), xlabel('Time (s)'), ylabel('Altitude (m)'), title('Altitude vs Time')
subplot(2,1,2)
plot(t,v(t),'o',tx,v(tx)), xlabel('Time (s)'), ylabel('Velocity (m/s)'), title('Velocity vs Time')
elseif (t < 117.5)
h = @(x) 30375 + (1350*x) + 0.5*(-11.5)*x.^2;
fprintf('Altitude: %dm\n\n', h(t))
v = @(x) 1350 - 11.5*x;
fprintf('Velocity: %dm/s\n\n', v(t));
figure(2)
subplot(2,1,1)
plot(t,h(t),'o',tx,h(tx)), xlabel('Time (s)'), ylabel('Altitude (m)'), title('Altitude vs Time')
subplot(2,1,2)
plot(t,v(t),'o',tx,v(tx)), xlabel('Time (s)'), ylabel('Velocity (m/s)'), title('Velocity vs Time')
end
2 个评论
RetiredCheetoXI
2022-2-4
Davide Masiello
2022-2-4
I just created a vector of times that spans around your input time.
If the code works and you are satisfied with the answer, please accept it. I will reply to any further questions anyways.
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