Depending on the chosen algorithm for a node, its output value will be calculated by using either one or two operators, or none at all. In particular, the first operator, called “Operator 1” is used when the algorithm is either “Global only”, “Single” or “Double”.

If the algorithm is either “Global only” or “Double”, Operator 1 describes how to combine the global input values. If the algorithm is “Single”, Operator 1 describes how to combine the global input values as well as the local value.

The second operator, called “Operator 2” is used only when the algorithm is “Double”. In this case it is used to describe how to combine the result from Operator 1 and the local value.

Note that unless the algorithm is “Local only” or “Correlation”, you can see which Operator 1 is being used in a given node by looking at its icon.

For Operator 1 you have the following options:

	• Sum
	• Product
	• Maximum
	• Minimum

Sum

If “Operator 1” is “Sum”, then the node combines all input values by adding them. If the chosen algorithm is “Single”, the node also includes its own local value in the sum.

Product

If “Operator 1” is “Product”, then the node combines all input values by multiplying them. If the chosen algorithm is “Single”, the node also includes its own local value in the product.

Maximum

If “Operator 1” is “Maximum”, then the node combines all input values by taking the maximum value. If the chosen algorithm is “Single”, the node also includes its own local value in the maximum.

Minimum

If “Operator 1” is “Minimum”, then the node combines all input values by taking the minimum value. If the chosen algorithm is “Single”, the node also includes its own local value in the minimum.