How can I visualize that data for a cell is not applicable?
Let's say I have a data table of students:
Name | Birthdate | Exit of school | Average Grade
----------------------------------------------------
Alice | 01.02.2010 | 23.10.2017 | 1.2
Bob | 28.04.1990 | 08.10.2011 | 1.7
Charlie| 28.02.2015 | N/A | 1.5
Charlie did not exit school so far, so this is not available.
What are design options / considerations to show this?
I see the following alternatives:
- Leaving the cell empty
- Putting
-
(many options here) inside the cell - Putting
N / A
inside the cell - Filling the cell in black
- Putting a diagonal line from lower left to top right in the cell
Are there any advantages / disadvantages of the options? Are there other options?