How to make the 3d plot?

vertex=[3 5 3 ; 7 5 5 ; 3 5 5 ; 3 6 5 ; 3 6 3];
face= [1 2 3 ; 2 3 4 ; 1 2 5 ; 2 4 5];
patch('Faces',face,'Vertices',vertex,'Facecolor',[0.8 0.8 1]);
view(3);
grid on

vertex=[3 5 3 ; 3 5 5 ; 3 6 5 ; 3 6 3];
face= [1 ; 2 ; 3 ; 4 ];
patch('Faces',face,'Vertices',vertex,'Facecolor',[0.8 0.8 1]);
view(3);
grid on

Hi guys i got confused about ploting 3-D pyramid.

Here ara the edge coordinates of the pyramid.

How can i plot it with all of its surfaces ?

Answer 1

[Walter Roberson]

vertex=[3 5 3 ; 7 5 5 ; 3 5 5 ; 3 6 5 ; 3 6 3];
face= [1 2 3 nan; 2 3 4 nan; 1 2 5 nan; 2 4 5 nan; 1 3 4 5];
patch('Faces',face,'Vertices',vertex,'Facecolor',[0.8 0.8 1]);
view(3);
grid on

[Hoon Jung]

Dont make ... whats wrong ..?

[Walter Roberson]

Which MATLAB release are you using? I tested before posting.

Note that the way you can tell that all surfaces have been created is that you cannot see into the pyramid. In your original code you drew the four triangular faces but not the square base, so you could see into the pyramid from the square side.

[Hoon Jung]

dont working .. now i use the my cell phone matlab can you show me your total code and picture ..? Sorry again ask .. and really thaks so much teach me !

[Walter Roberson]

Total code:

vertex=[3 5 3 ; 7 5 5 ; 3 5 5 ; 3 6 5 ; 3 6 3];
face= [1 2 3 nan; 2 3 4 nan; 1 2 5 nan; 2 4 5 nan; 1 3 4 5];
patch('Faces',face,'Vertices',vertex,'Facecolor',[0.8 0.8 1]);
view(3);
grid on

The output:

This is correct output. You can use the plot tools to rotate it to see other faces.

The initial part of your original attempt was:

Notice the line from the bottom left corner. That is the internal edge of the corner "behind" the view, and it is visible because your original attempt did not draw the square face at the base of the pyramid. In the code I posted, you can tell that the square face has been drawn because that line is not visible.

If you want to see with more emphasis:

vertex=[3 5 3 ; 7 5 5 ; 3 5 5 ; 3 6 5 ; 3 6 3];
face= [1 2 3 nan; 2 3 4 nan; 1 2 5 nan; 2 4 5 nan; 1 3 4 5];
patch('Faces',face,'Vertices',vertex,'FaceVertexCData', hsv(size(vertex,1)));
shading interp
view(3);
grid on