How to evaluate the variable in a maestro measurement expression and not treat it as a literal string

I am trying to measure some signals and it is constantly evaluating it as a string and not capturing it as a variable

Example:

This scenario works perfectly --> maeAddOutput(strcat("read" "avg") title ?outputType "point" ?expr "average(VT(\"/net_read\"))")

But I am trying to use a variable for the signal name, how can I achieve that.?

Example: name = “net_read”

maeAddOutput(strcat("read" "avg") title ?outputType "point" ?expr "average(VT(\"/name\"))")

 How can I tell it to replace name with the variable because it is currently processing name as an input  signal and not the content (net_read)

What is the correct syntax to insert variable in a maestro measurement expression