How to extract data from a 3d implicit plot?

Hi,

I would like to extract data from 3d implicit plot. My plot:

[Y,X,Z] = ndgrid(linspace(-2,2,30),linspace(-2,2,30),linspace(-2,2,30)); 
V = ((X.^2).*(1-X.^2)-Y.^2).^2+0.5*Z.^2-0.025*(1+1.0*(X.^2+Y.^2+Z.^2)); 
p = patch(isosurface(X,Y,Z,V,0)); 
isonormals(X,Y,Z,V,p); 
set(p,'FaceColor','b','EdgeColor','k','FaceAlpha',0.1,'EdgeColor','none'); 
daspect([1 1 1]) 
axis square;

How can I get the coordinates of the points on the surface?

Thanks.

[per isakson]

"'EdgeColor','none' " on a separate line looks as a mistake

[Amir]

It was a mistake, thak you!

Answer 1

[per isakson]

Matlab has a tool called "Data Cursor". It has a icon in the Tool bar of the Figure window. With that you can "extract" data from the diagram. Select a point, right click, choose Export Cursor Data ...

Is that what you mean?

--- Cont. ---

The surface is represented by a patch with the handle, p.

"points on the surface" is a bit vague.

get(p) returns a list of properties of the patch. Those of interest to you are

        ...
  Vertices = [ (584 by 3) double array]
  XData = [ (3 by 1172) double array]
  YData = [ (3 by 1172) double array]
  ZData = [ (3 by 1172) double array]
        ...

The vertices are "points on the surface".

[Amir]

Thanks, but I would like to export all the points of the surface on the grid. If I work with a 100x100x100 grid it's impossible to get the points with 'Data Cursor'.