Pass an argument to a yaml configuration file

edit

I have a configuration file that I am loading in my launch file using rosparam,

rosparam command="load" file="$(find my_pkg)/config/analyzer.yaml"

I want to pass namespace (an arg) arg name="name_space" value="my_robot" into that yaml file when loading it so I don't have to hardcode it within yaml. Any suggestions on how to do it or if it's possible?

EDIT: Following is part of my analyzer.yaml,

analyzers:
  robot:
    type: diagnostic_aggregator/AnalyzerGroup
    path: robot
    analyzers:
      power:
        type: diagnostic_aggregator/GenericAnalyzer
        path: Power
        remove_prefix: namespace/diagnostics
        timeout: 5
        expected:
          - "namespace/diagnostics: Voltage"
          - "namespace/diagnostics: IMU"
          - "namespace/diagnostics: Odom"

I want to read the namespace bit of this yaml file from launch file argument.