Calculates the area for datasets.
Comment
@f{area} Calculates the area for all 2D datasets in the parent layer of the text object.
@f{area(Diagram1, Diagram2)} Calculates the area for all datasets in the specified diagrams.
@f{area(Diagram, DatasetIndex)} Calculates the area for dataset with the index 1,2,3, ...
@f{area(DatasetName)} Calculates the area for dataset with the index 1,2,3, ...
id-1171280