Problem with facealpha property

[Fernando Martínez Martí]

Hello,

I am trying to make a transparent area using the command area and the property facealpha as follows:

ha=area([0 2],[3 3]);
set(ha, 'faceColor', 'r');
set(ha, 'lineStyle', 'none');
set(ha, 'facealpha', 0.2)

but I get the next error
error: get: unknown hggroup property facealpha

What am I doing wrong? I am using Octave version 3.8.1 in Ubuntu Linux 12.06.

Thank you very much in advance for your time.

Best Regards,
Fernando

-- 
Fernando Martínez Martí
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