Access of global array element not allowed

Hey everyone,

in my code i implemented a class (called Job) which has get and set functions (inherited from hgsetget). I initialised a global array of Job objects (called JobStack) and want to set the properties of every single element within this array, but MATLAB throws an error 'Setting the 'id' property of the 'Job' class is not allowed.'

In my Job class I defined property access=public and also method access=public, so in my eyes it should be allowed to use the set routine.

Thanks for your help!

PS: some parts of the code:

classdef Job < hgsetget

      properties (Access = public)
          id;
      end

      methods
          %constructor
          function obj = Job(varargin)
              ...
          end

          %set functions
          function set.id(obj,id_)
              if (id_ < 0)
                  error('Id must be positive')
              else 
                  obj.id = id_;
              end
          end
      end
  end

The part where I initialise my global array of Jobs:

global JobStack;
for i=(1:N)
    JobStack(i) = Job();
end

And the loop in which I try to set the id value:

for i=(1:N)
    get(JobStack(i), 'id');
end

Answer 1

[Geoff Hayes]

Andreas - the code you reference is to get the id

 for i=(1:N)
    get(JobStack(i), 'id');
 end

and not set the id. If I use a cell array to create the JobStack as

 global JobStack;
 N=25;
 for k=(1:N)
    JobStack{k} = Job();
 end

and then set the id as

 for k=(1:N)
    set(JobStack{k},'id',k);
 end

it seems to work fine. Try the above and see what happens!

Answer 2

[Andreas Mießen]

Oh sorry, it was not the get, instead the line

set(JobStack(i), 'id', i);

If I change the round brackets to braces, it doesn't work at all. And it should be an array of Jobs and not a cell array.