MATLAB: Check for the existence of a variable inside a structure array

exist

I have a structure array:
data{1} =
         date: 19580508
          lon: 159.3833
          lat: -23.4667
        depth: [12x1 single]
         temp: [12x1 single]
          sal: [12x1 single]
          oxy: [12x1 single]
Some of them have the variable 'oxy', others don't. I am trying to figure out how to check for the existence of 'oxy'.
I tried to use A = existence('data{1}.oxy'), but its results are always 0, even when the variable exists.
Should I use some other function to achieve this? Thanks!

Best Answer

any(ismember(fields(data{1}),'oxy'))
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