histogram property
A map from the values of the facet associated with distinct values to the number of matching entries with corresponding value.
The key format is: * (for string histogram) string values stored in the
field. * (for named numeric bucket) name specified in bucket() function,
like for bucket(0, MAX, "non-negative"), the key will be non-negative.
- (for anonymous numeric bucket) range formatted as
-, for example,0-1000,MIN-0, and0-MAX.
Implementation
core.Map<core.String, core.String>? histogram;