Have you ever set up an equation in Excel and gotten an error message---such as #N/A, #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL!? Total buzzkill. On one hand, these alerts serve a greater good. They let you know if your formula has gone awry. And, on the other hand, they can show up in an embarrassing places.
In our Roll Your Own Gradebook series, we made the assumption that we had classes of Stepford children: every student completed every assignment. But let's face it, that's not what really happens. For example, let's say that Flash Gordon wasn't enrolled in the course for the first quarter. If there are no scores, then Excel gives us an error message when it tries to apply the formula:
How It Works
You could apply the formula to more than one location in the gradebook and get the same result, but for now, let's look at the worksheet with the scores.
|Superhero Behaving Badly|
Instead, we can use =IFERROR((MEDIAN(H14,J14)),"") The double double-quotes at the end tell Excel to leave the cell blank. However, you can put another value there or even a text string (e.g. "No Grade"). Here is what we see now:
A blank. Wow. Excel is doing just what we told it to do. Imagine that.