This retrieves the value of the specified variable. It is the same as get.var() except that it enables retrieval of individual array elements.
The process from which the variable is to be retrieved. You can specify the process ID, or you can use the predefined variables pid or parent.
The name of the variable to be retrieved (this must be a lower case string). The variable can be a single variable or an array and must be declared as external. Instead of specifying the variable name, you can specify a variable in which the name is stored.
This stores the value of the retrieved variable or array element.
Use these to specify a particular array element to be retrieved. To retrieve a single variable, set dim1 to 1 and omit the other dim arguments.
| ret_str contains "quick     "