Hi Jennifer,
thank you very much for your reply! Your solution refers to using #N/A or alternatively the data source menu - both options I alread noted to not be working on whisker plots in my original post. For a Whisker Plot the "Hidden and Empty Cells" is gray and
inactive (sorry for the german version in my screenshot). When using #N/A it at least does not plot a zero as it does for a string... But the empty row is still there in the plot.
Whisker plots seem to be fundamentally differnent from typical Excel line or scatter plots. They also don't allow manual positioning of the legend for example. Also no drag and drop to adjust the data source.
So far I don't see a way to remove the empty rows in the plot, except hiding all empty cells with a filter. But this only partially takes care of the problem, as if there is empty cells in the data range at the bottom of the sheet those cells will not be
hidden. So the empty row in the plot just moves to the end. And filters don't auto update unless with macros which is also not satisfying.
All the best,
Thomas
*Note: issue not resolved