How to get a value from the output of a operator in RapidMiner?
I want to get a value from the output of a operator in RapidMiner, and input the value into the parameter of expression of another operator.
My process XML is attached below.
The picture corresponding to the XML is as following,

The output of the Aggregate operator is as following,

The paramenter needed in Generate Attributes operator is as following,

The parameters "90" needing to be set in the Generate Attributes operator correspond to the "90" in the above picture.
I want to know whether the "90" induced by the Aggregate operator can be passed to Generator Attribute operator. Now I set the parameter "90" manually. I hope that this process does not require manual intervention.
My process XML is attached below.
The picture corresponding to the XML is as following,

The output of the Aggregate operator is as following,

The paramenter needed in Generate Attributes operator is as following,

The parameters "90" needing to be set in the Generate Attributes operator correspond to the "90" in the above picture.
I want to know whether the "90" induced by the Aggregate operator can be passed to Generator Attribute operator. Now I set the parameter "90" manually. I hope that this process does not require manual intervention.