I have applied a point clustering effect on a layer in QGIS. What I'd like to be able to do is cluster on all features except the ones that I have a NULL value in an attribute. I can Categorize on feature when zoomed in using the rendered Settings, but there doesn't seem to be an option for categorizing data when clustered.
Actually, the cluster renderer does support categorized styles.
Next to the word
Renderer there's a dropdown menu, where you can choose Categorized.
Under the Renderer type selection menu, click the button
Rendering Settings... to access the normal layer style panel settings for a Categorized style.
Categorize by the field that has values. Un-check the category. Now the points with values won't be displayed or included in any point clusters.
Here's a workaround I wrote up before I realized that the cluster renderer supports categorized styles:
Apply a Filter to the layer.
Here's a point layer with a 20 mm cluster distance:
Apply a filter
"field" is not null"
Now the points with values in the field are excluded from the point clusters: