The following are a few advantages of the diagrammatic presentation of data.
(i) Simple and Easy to understand: The data presented in the form of diagrams is the simplest and the most easy to understand. The entire data can be easily understood even by having a single glance of the diagram.
(ii) Attractive and Impressive: Diagrammatic presentation makes the data more attractive and interesting. Diagrams tend to leave along lasting impact on the mind.
(iii) Helpful in Making Comparisons: The presentation of data in the form of diagrams helps in making comparisons between two or more groups or two or more periods.