MATLAB: Scatter3 with weights

heatmapscatterplot

Hi,

I want to make a scatterplot of x, y, z coordinates and include the weight (which differs per particle) the locations have. So every particle has a specific weight and I want to combine all the weight of all the particles that have the same coordinates and visualize it as a heat plot. Is this possible?

Thanks!

Best Answer

You could pass color values as follows

n = 1000;
X = rand(n, 1); Y = rand(n, 1); Z = rand(n, 1); C = hypot(X, Y);
size = 500;
scatter3(X, Y, Z, size, C, '.');
colormap jet

Or do you want to take a slice along the xy-plane? Then you should probably look at this page .

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[X, Y, Z, 1] is a homogeneous vector and so is unique only up to multiplication by a non-zero scalar, w.

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It is relatively straightforward to do what you want:

x = rand(10, 1);                                                % Create Data


y = rand(10, 1);                                                % Create Data
z = rand(10, 1);                                                % Create Data
zscaled = z*10;                                                 % May Be Necessary To Scale The Colour Vector
cn = ceil(max(zscaled));                                        % Number Of Colors (Scale AsAppropriate)
cm = colormap(jet(cn));                                         % Define Colormap
figure(2)
scatter3(x, y, z, [], cm(ceil(zscaled),:), 'filled')
grid on

Best Answer

Related Solutions

MATLAB: Project 2nd points onto a 3D reconstructed scene

MATLAB: Colouring dots in scatter3 according z-value

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