sum-of-turtles-with [condition] [list of commands]
Reports the total value of [list of commands] when run
over the turtles that satisfy the condition . If there are
no turtles in which the condition is true, returns 0. Note:
This command can also be executed by patches, for example within an ask-patches
statement.
Note: When a turtle calls the command, it is not included as part of
the calculation.
Examples:
sum-of-turtles-with [color = red] [age] returns the sum of the ages
of all the red turtles.
Related commands:
sum-of-turtles
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