Of course, in many cases, the number of children is a very valuable metric in itself, but in many cases, more interesting insight can be had from more specific measurements. for example, if there are multiple potential children types it might be more interesting to get the number of children of each type separately or measure the numerical density of objects within each parent.

However, many of these features are not available within the standard feature set since they wouldn't make sense in many cases that don't involve compartmentalization. Instead, we must create new Custom Features. To do this, we open the Custom Features window directly from the Objects menu or from the feature selection window in the Objects table:

In the Custom Features Window we can then add a new Custom Feature:

Examples of useful Custom Features include:

• Numerical Density - This is a Compute feature reporting the Ratio of # Children to Volume
• Specific Children Count - An object count feature linked to a specific object tag
• Children Volume Statistics - A Group Statistics feature of the volume of children in a group.

.. and many combinations thereof (Volume ratio, tag specific numerical density, etc).