Aggregation operators¶
-
class
COUNT
[source]¶ Counts the number of regions in the group. It is automatically computed by the
map()
operation
-
class
MIN
(argument)[source]¶ Gets the minimum value in the aggregation group for the specified attribute
-
class
MAX
(argument)[source]¶ Gets the maximum value in the aggregation group for the specified attribute
-
class
AVG
(argument)[source]¶ Gets the average value in the aggregation group for the specified attribute
-
class
BAG
(argument)[source]¶ Creates space-separated string of attribute values for the specified attribute. It is applicable to attributes of any type.
-
class
STD
(argument)[source]¶ Gets the standard deviation of the aggregation group for the specified attribute