struct weirdness

[Przemek Klosowski]

I was looking at the example from http://wiki.octave.org/Cookbook:

samples = struct ("patient", {"Bob", "Kevin", "Bob" , "Andrew"},
                   "age",     [ 45  ,  52    ,  45   ,  23     ],
                   "protein", {"H2B", "CDK2" , "CDK2", "Tip60" },
                   "tube"   , [ 3   ,  5     ,  2    ,  18     ]
                   );

in Octave 3.6.2. I see that samples.patient returns the sequence of 
names, as I'd expect (ans = 'Bob, ans = Kevin, etc). However, 
samples.age returns the 'age' array four times. Also, samples(1)
returns

scalar structure containing the fields:
 patient = Bob
     age = 45   52   45   23
 protein = H2B
    tube =  3    5    2   18

rather than what I was hoping for (Bob, 45, H2B, 3).

This cookbook recipe looked like a neat idea for keeping track of 
complex data but is there a better way using struct() for this purpose? 
or is a newer version of Octave required?