MATLAB: Combine surf and scatter3 in one axes

3d plots

I want to combine a surf and a scatter3 in a single axes so that the scatter points are displayed above or below the surface (dependent of there Z value) in the same coordinate system.

When creating surf or scatter3 the axes handle is provided as a first parameter

surf( handles.myAxes, ...
scatter( handels.myAxes, ...

I also tried

surf( handles.myAxes, ...
hold on;
scatter( handels.myAxes, ...

The result remains always the same. Only the scatter3 points are shown in axes. The surf is invisible.

My questions

1) Is it possible to combine a surf and a scatter3 in a single axes at the same time? (Didn't find any hints on this limitation in the docs) 2) If yes how can this be achieved?

Best Answer

Thomas, what happens if you execute the following code? With and without the get command?

 k       = 5;
 n       = 2^k-1;
 [x,y,z] = sphere(n);
 surf(x,y,z);
 get(gcf, 'Renderer')
 hold on
 [X,Y,Z] = sphere(16);
 xx = 2*[0.5*X(:); 0.75*X(:); X(:)];
 yy = 2*[0.5*Y(:); 0.75*Y(:); Y(:)];
 zz = 2*[0.5*Z(:); 0.75*Z(:); Z(:)];
 scatter3(xx,yy,zz)
 get(gcf, 'Renderer')

Is this the behavior you are looking for?

Related Solutions

MATLAB: How i can solve this problem? Pleas!

Your ‘T’ matrix must become a cell array. See my sample of ‘T’ for an example.

Once you do that, I would do something like this:

Y = [12.004
    13.1573 
    11.1665  
    11.8082    
    12.2129   
    12.8075   
    12.4167  
    11.5708   
    12.5798    
    13.7489];
T={'cluster2'; 'cluster1'; 'cluster3'; 'cluster9'; 'cluster0'; 'cluster7'; 'cluster4'}; % Sample Of Cell Array
[UnqClust,~,idx] = unique(T);                                                           % Unique Values & Locations
Out = Y(idx);                                                                           % Mapped Output
for k1 = 1:length(idx)
    fprintf(1, '\t%s\t%.4f\n', T{k1}, Out(k1))              % Demonstration Output (Delete Loop)
end
  cluster2  11.1665
  cluster1  13.1573
  cluster3  11.8082
  cluster9  12.4167
  cluster0  12.0040
  cluster7  12.8075
  cluster4  12.2129

MATLAB: Does creating a new plot reset the axes properties

This behavior is expected, the 'plot' command resets the axes properties before plotting.

There are two ways of resolving this:

You can change this behavior using the 'hold' command,
You can manually toggle the NextPlot property to 'replacechildren' or 'add' (this is how 'hold on' is implemented).

% Example 1 - Using the hold command
f = figure();
ax = axes(f);
ax.Tag = 'MyAxesTag';
[X,Y,Z] = sphere(16);
x = [0.5*X(:); 0.75*X(:); X(:)];
y = [0.5*Y(:); 0.75*Y(:); Y(:)];
z = [0.5*Z(:); 0.75*Z(:); Z(:)];
disp(['The Axes Tag before scatter3 is: ', ax.Tag])
hold(ax,'on')
scatter3(ax,x,y,z)
disp(['The Axes Tag after scatter3 is: ', ax.Tag])

The hold command allows for the retention of the current plots when creating new plots. For more information, please see:

https://www.mathworks.com/help/matlab/ref/hold.html

% Example 2 - using the NextPlot property
f = figure();
ax = axes(f);
ax.Tag = 'MyAxesTag';
[X,Y,Z] = sphere(16);
x = [0.5*X(:); 0.75*X(:); X(:)];
y = [0.5*Y(:); 0.75*Y(:); Y(:)];
z = [0.5*Z(:); 0.75*Z(:); Z(:)];
disp(['The Axes Tag before scatter3 is: ', ax.Tag])
ax.NextPlot = 'add'
scatter3(ax,x,y,z)
disp(['The Axes Tag after scatter3 is: ', ax.Tag])

Best Answer

Related Solutions

MATLAB: How i can solve this problem? Pleas!

MATLAB: Does creating a new plot reset the axes properties

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