Create IDS with Arrays of Structures (AoS)¶

    % empty IDS structures can be created without opening data entry
    % all you have to do is to instantiate IDS object

    empty_core_profiles = ids_init('core_profiles');

    % Note! Every IDS must have <ids>/ids_properties/homogeneous_time field set with one of possible values
    % Possible homogeneous_time values are:
    %  0 - IDS_TIME_MODE_HETEROGENEOUS: All time-dependent quantities in the IDS may have different time coordinates.
    %  1 - IDS_TIME_MODE_HOMOGENEOUS: All time-dependent quantities in this IDS use the same time coordinate, namely <ids>/time
    %  2 - IDS_TIME_MODE_INDEPENDENT: The IDS stores no time-dependent data.
    empty_core_profiles.ids_properties.homogeneous_time = 1;

    % it is also recommended to provide basic information regarding data source
    % even though this information is not required to store IDS, it is highly recommended
    % to fill these fields.
    %  <ids>/ids_properties/comment
    %  <ids>/ids_properties/provider
    %  <ids>/ids_properties/creation_date

    % when ids_properties.homogeneous_time is set to IDS_TIME_MODE_HOMOGENEOUS, 
    % all time-dependent fields values correspond to <ids>.time vector.
    empty_core_profiles.time = [1.0, 2.0, 3.0];

    % size of time dependent variables must be equal to the size of time vector
    empty_core_profiles.global_quantities.ip = [1.0, 2.0, 3.0];

    % IDSs can be printed using frpintf() method.
    fprintf('Dumping empty_core_profiles:\n');
    fprintf('\tempty_core_profiles.ids_properties.homogeneous_time: %i\n', empty_core_profiles.ids_properties.homogeneous_time);
    fprintf('\tempty_core_profiles.time:                            %i %i %i\n', empty_core_profiles.time);
    fprintf('\tempty_core_profiles.global_quantities.ip:            %i %i %i\n', empty_core_profiles.global_quantities.ip);
    fprintf('\n');

    % some fields are automatically written by AL during 'put' procedure
    % AL adds some information behind your back. This is particularly important
    % in case you want later on find out what particular version of AL was used when data were stored.
    % examples of this type of fields are <ids>/ids_properties/version_put and <ids>/ids_properties/plugins

    % this time we do not save IDS into database entry, all we do here is deallocating the memory
    % we have allocated in all previous steps.
    clear empty_core_profiles;