how can i get the data from 3D graph? xyz

[Walter Roberson]

Are you starting from an image, or are you starting from an active graph? If so, what kind of plot is it? Is there a reason you are not just recording the data instead of trying to extract it from the graphics?

[alef imran]

yeah im starting from a single image and its already extract. right know im stuck on finding the value of this graph

[Azzi Abdelmalek]

what is the extension of your file?

Answer 1

[Walter Roberson]

See http://www.mathworks.com/matlabcentral/fileexchange/?term=tag%3Adigitize

It is not going to work very well: your data is too close together and there is too much overlap.

[Asrith Pyla]

Mr. Walter Robinson

I have an image stored from Matlab. It is of a 3D plot. I have to extract the z data from this plot.

How to do this ?

[Walter Roberson]

My response would be the same: you can use any of those contributions from the File Exchange, but you are not likely to get a good result. The hidden surface is going to cause you problems.

Answer 2

[Azzi Abdelmalek]

%-----Example------------
x=1:100
y=1:100
[X,Y]=meshgrid(x,y)
Z=sin(X).^2+cos(Y).^2
mesh(X,Y,Z)
%-------------------
ch=get(gca,'children')
X=get(ch,'Xdata')
Y=get(ch,'Ydata')
Z=get(ch,'Zdata')

[alef imran]

thanx its really helpful