3d lines plot

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Istvan
Istvan 2025-2-12
评论： Star Strider 2025-2-13
Dear everybody,
I have a problem, I want to draw 3 line.
First line: In xy plan has to be sin(x) ;
Second line: In xz plan has to be cos(x) ;
Third line: In xyz plan has to be sin(x)+cos(x);
I have no idea for it. What is the solution?
I will appreciate your help.
Thank you.
Istvan
  2 个评论
Sam Chak
Sam Chak 2025-2-12
Hi @Istvan, The first curve is , and the second curve is . But I cannot visualize the third curve on the so-called "x-y-z" plane. Can you sketch it?
Istvan
Istvan 2025-2-12
编辑：Istvan 2025-2-12
Hi @Sam Chak,
It would be an elliptically polar wave. in this picture the cos and sin function are replaced, but the point is the same.

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Star Strider
Star Strider 2025-2-12
Ran in:
Peerhaps something like this —
t = linspace(0, 1).';
x = sin(2*pi*t);
y = cos(2*pi*t);
z = x+y;
figure
plot3(x, y, z)
grid on
xlabel('X')
ylabel('Y')
zlabel('Z')
axis('equal')
figure
stem3(x, y, z, '.')
hold on
patch(x, y, zeros(size(z)), 'g', FaceAlpha=0.5)
hold off
grid on
xlabel('X')
ylabel('Y')
zlabel('Z')
axis('equal')
figure
patch(x, y, z, 'r', FaceAlpha=0.5)
hold on
patch(x, y, zeros(size(z)), 'g', FaceAlpha=0.5)
hold off
grid on
axis('equal')
xlabel('X')
ylabel('Y')
zlabel('Z')
view(-27, 30)
.
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Istvan
Istvan 2025-2-13
@Star Strider Perfect, that is exatly what i thought.
I am grateful to you.
Thank you.
Best regards.
Star Strider
Star Strider 2025-2-13
My pleasure!
If my Answer helped you solve your problem, please Accept it!
.

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