如何添加＆QUOT;指针＆QUOT;注释在MATLAB三维情节？ [英] How to add a "pointer" annotation to a 3-D plot in MATLAB?

问题描述

欲一个指针添加到的3-D图。结果
我想这个指针在上我得出一个球一定当场点。结果
该指针不必有一个箭头，但如果它确实是好的。

I want to add a "Pointer" to a 3-D plot.
I want this "pointer" to point at a certain spot on a sphere that I have drawn.
This pointer does not have to have an arrowhead but would be nice if it did.

感谢您的帮助！

推荐答案

The MathWorks公司文档平原副本。欲知详情看看这个。

Plain copy from The MathWorks documentation. For further details have a look at this.

% Create a sphere and color it using a topographic colormap:
cla reset;
load topo;
[x y z] = sphere(45);
s = surface(x,y,z,'FaceColor','texturemap','CData',topo);
colormap(topomap1);
% Brighten the colormap for better annotation visibility:
brighten(.6)
% Create and arrange the camera and lighting for better visibility:
campos([2 13 10]);
camlight;
lighting gouraud;
axis off vis3d;
% Set the x- and y-coordinates of the textarrow object:
x = [0.7698 0.5851];
y = [0.3593 0.5492];
% Create the textarrow object: 
txtar =  annotation('textarrow',x,y,'String','We are here.','FontSize',14);

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