Special plot3 command in Matlab

Hi. I have a matrix named S, e.g.

 S =
   [25     4    14
    26     4    14
    27     4    14
    28     4    14
    29     4    14
    30     4    14
    31     4    14
    32     4    14
    33     4    14];

Every row in matrix S indicates a point in 3D space. I want to use plot3 command to plot these points.

 plot3(S(:,1),S(:,2),S(:,3),'s')

This code plots these points with squares, but I want to have cubes instead of squares. How can I do that?

Thanks.

Answer 1

[Jan]

As you can find the in the documentation of plot3, or to be exact at the link to "line properties", cubes are not a recognized marker type. Then you have to draw them by your own.

It matters if you want the wireframe of the cube or filled patches.

See e.g. https://www.mathworks.com/matlabcentral/fileexchange/15161-plotcube or http://jialunliu.com/how-to-use-matlab-to-plot-3d-cubes/ (I magically found these links by asking an internet search engine for the terms "Matlab draw cube" - you can do this by your own also.)

[mr mo]

Thanks a lot.

[mr mo]

These codes are working very well. At this moment I want to add a legend to the plotted cubes. I have some big numbers of 3 colored cubes. How can I add legend to this plot ? Thanks a lot.

[mr mo]

Are you have any idea how to add legend to this function ? https://www.mathworks.com/matlabcentral/fileexchange/15161-plotcube

[Jan]

@mr mo: By using the legend command?

[mr mo]

yes. I provide my data-set in this new question. https://mathworks.com/matlabcentral/answers/370981-adding-special-legend-to-plotted-data

[mr mo]

@Jan Simon: Do you have any idea how to add legend to this function? Thanks a lot.

[Jan]

@mr mo: The link in your former comment is dead now. For which function are you searching a legend? Did you try to provide one handle per legend entry? The plotcube command would need to add an output of the handles. But I would take this code as example only, how to call patch. E.g.:

side = 5;
verts = ([0 0 0;0 1 0;1 1 0;1 0 0;0 0 1;0 1 1;1 1 1;1 0 1] - 0.5) .* side;
face = [1 2 3 4;5 6 7 8;3 4 8 7;1 2 6 5;2 3 7 6;1 4 8 5];
h1 = patch('Faces',face,'Vertices',verts,'FaceColor','b', ...
           'EdgeColor','w');
h2 = patch('Faces',face,'Vertices',verts + 8,'FaceColor','g', ...
           'EdgeColor','k');
legend([h1, h2], {'1', '2'})
view(45, 30)
grid on

[mr mo]

Thanks a lot. I want to add legend to plotcube function.