我需要绘制彩色速度场的三维球体。我在寻找一个功能，类似于此：

I need to plot a colored velocity field over a sphere in 3d. I'm looking for a function that looks similar to this:

F（X，Y，Z，V）其中， X ，是，以Z 重present的三维坐标（即使用的是形成3维矩阵 meshgrid ）和 V 是一个三维矩阵，它确定为每个坐标的速度值。结果应按照 V 每一个坐标。

f(X, Y, Z, V) Where X, Y, Z represent the 3d coordinates (3 dimensional matrices that are formed using meshgrid) and V is a 3 dimensional matrix that determines the velocity value for each coordinate. The result should be a 3d colored plot with a changing color according to the value in V for every coordinate.

我试图用等值面但它没有很好地工作，因为我需要的轮廓，我只需要在特定的值我在每一个坐标。我用 quiver3 和它的作品很好，但我需要的阴谋通过颜色映射，而不是箭头。

I tried to use isosurface but it didn't work well because I need contours, I just need the specific value I have in every coordinate. I used quiver3 and it works well but I need the plot to be mapped by colors rather than arrows.

我真的AP preciate任何想法和解决方案，因为我一直在阅读了很多类似的问题，很多意见（像这样的：的如何绘制在MATLAB 4D轮廓线（XYZ-V）？），找不到任何解决方案。

I would really appreciate any ideas and solutions as I've been reading lots comments of many similar questions (like this one: How to plot 4D contour lines (XYZ-V) in MATLAB?) and couldn't find any solution.

感谢你在前进。

推荐答案

我同意克里斯的回答。但是，它可能是值得为如何 一个小例子scatter3 用于：

I agree with Chris's answer. However, it might be worthwhile to provide a little example on how scatter3 is used:

第一：

x = rand(1,100);     % x-coordinates
y = rand(1,100);     % y-coordinates
z = rand(1,100);     % z-coordinates
i = rand(1,100)*200;

% specify the indexed color for each point
icolor = ceil((i/max(i))*256);  

figure;
scatter3(x,y,z,i,icolor,'filled');
% if you omit the 'filled' option, you'll just get circles

这第一个例子会给你颜色和基于变量尺寸我。如果你希望你的散点是在颜色依赖于我，但大小均匀，考虑第二种方法的值：

x = rand(1,100);     % x-coordinates
y = rand(1,100);     % y-coordinates
z = rand(1,100);     % z-coordinates
i = rand(1,100)*200;

% specify the indexed color for each point
icolor = ceil((i/max(i))*256);  

% after setting the color based on i, reset i to be uniform
i = ones(size(i)).*100;

figure;
scatter3(x,y,z,i,icolor,'filled');