Feature request #15939
Diagram Histogram: being able to hide classes that are null or do not return valid values
|Pull Request or Patch supplied:||No||Resolution:|
|Easy fix?:||No||Copied to github as #:||23855|
Layer properties --> Diagram --> Histogram
In some situations, you may not have values for a field being classified (NULL) or these values do not match what you want to show (eg, using an expression-based field _case when "myfield"> 10 then "myfield" end ). In these case, QGIS will draw an empty place (horizontal line) for the concerned field.
It could be nice if instead of showing these "holes", there was an option to hide them and have a more compact histogram with only "valid" fields.