clustering (chart) option not available

[clt_cabq]

I have one feature layer that i display in a web map as two separate layers, each with a different filter. One of these allows me to use the Clustering (Chart) option, the other doesn't. They have the same Popups configured. One is visible at a larger scale than the other. Any thoughts on why the chart clustering option doesn't work on one of these? 

[RussRoberts · Accepted solution]

What style are you using are the layer? If you are using Types style and you have more than 10 classes the cluster chart cannot be used. This is similar to the chart style on individual features only allows for 10 classes as well. 

[clt_cabq]

@RussRoberts that was it - I was just using a single symbol type, but when i changed it to use a field, the chart type clustering became available, I didn't realize aggregation was linked to the style.

[RussRoberts]

Yup when using a field to style the individual features we will try to use it and if using standard clustering and using Types or a Counts and Amounts style for example will try to show you the predominant value within that cluster. Then if you have classes we can use those to bring in chart clustering. We are looking into how we can bring in clustering styling so you can add summary statistic fields for the aggregated features and use those to drive the style of the cluster similar to what we are doing in binning today.