MATLAB: Stem3 with log axis – recovering stems

stem3

I create a stem3 plot with x, y, and z values. When the z-axis is linear, I get stem lines. When I change the z-axis to log, the stems disappear. I would like to recover them somehow.
I am familiar with this issue w.r.t the 2-D stem function http://www.mathworks.com/support/solutions/en/data/1-QB3KB/?solution=1-QB3KB
I'm not able to find corresponding properties for stem3 via the get(gcf), get(gca), and related commands.
1) Is there an equivalent setting(s) in stem3 that will allow this?
2) If not, is there a property that returns the zmin value of the logarithmic z axis? axis returns the values set in linear mode before I changed the z-axis scale property to log
3) Do I need to just code the line generation for log z mode?

Best Answer

What happens is that a stem plot has the lines with on point on the z=0 plane. Taking the log of this throws this point to -inf. This works:
X = linspace(0,1,10);
Y = X./2;
Z = sin(X)*2000 + cos(Y)*2000 + 1e3;
L = stem3(X,Y,Z,'fill');
C = get(L,'child');
Zd = get(C(1),'zdat')
Zd(Zd==0) = 1;  % No zeros in the data!
set(C(1),'zdata',Zd)
set(gca,'zscal','log')
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