具有4D数据的3D散点图 [英] 3D scatter plot with 4D data

问题描述

我需要绘制一个3D图形，每个数据点都使用色图使用第4个变量的值进行着色.可以说我有4个变量X，Y，Z和W，其中W = f(X，Y，Z).我想要一个以X，Y和Z为三个轴的3D图.语句scatter3(X,Y,Z,'filled','b')给了我3D的散点图，但我想通过将点表示为额外参数来将Z的值合并到图形中(可以使用不同的区域:对于Z值较高而较小的数据点，圆圈较大圈出Z值较低的数据点，或使用色图绘制具有不同颜色的数据点).但是，我是MATLAB的新手，真的不知道如何进行.任何帮助将不胜感激.

I need to plot a 3D figure with each data point colored with the value of a 4th variable using a colormap. Lets say I have 4 variables X,Y,Z and W where W = f(X,Y,Z). I want a 3D plot with X, Y, and Z as the three axis. The statement scatter3(X,Y,Z,'filled','b') gives me a scatter plot in 3D but I want to incorporate the value of Z in the graph by representing the points as an extra parameter (either with different areas :bigger circles for data points with high value of Z and small circles for data points with low value of Z or by plotting the data points with different colors using a colormap). However, I am a novice in MATLAB and dont really know how to proceed. Any help will be highly appreciated.

提前谢谢！

推荐答案

因此，对于大小矢量(第4个输入)和颜色矢量(第5个输入)只需使用z:

So just use z for the size vector (4th input) as well as the color vector (5th input):

z = 10*(1:pi/50:10*pi);
y = z.*sin(z/10);
x = z.*cos(z/10);

figure(1)
scatter3(x,y,z,z,z)

view(45,10)
colorbar

大小向量必须大于0，因此您可能需要相应地调整z.

The size vector needs to be greater 0, so you may need to adjust your z accordingly.

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