update configuration file

Signed-off-by: YuxuanLiuTier4Desktop <[email protected]>

nebula_examples/launch/hesai_offline_bag_pcd.xml

@@ -7,15 +7,15 @@
 
     <!-- sensor related configuration -->
     <arg name="sensor_model"  description="Pandar64|Pandar40P|PandarXT32|PandarXT32M|PandarAT128|PandarQT64|Pandar128E4X"/>
-    <arg name="lidar_parameter_file" description="Path: LiDAR configuration yaml similar to nebula_ros/config/lidar/hesai/*.yaml"/>
+    <arg name="lidar_parameter_file" default="$(find-pkg-share nebula_ros)/config/lidar/hesai/$(var sensor_model).param.yaml" description="Path: LiDAR configuration yaml"/>
     <arg name="bag_path" description="String: Directory of the ROSBag"/>
     <arg name="input_topic" description="String: Packet topic of the ROSBag"/>
     <arg name="output_topic" description="String: Output point cloud topic"/>
     <arg name="out_path" description="Path: output directory"/>
 
     <!-- output sample number configuration -->
-    <arg name="out_num" default="5"/>
-    <arg name="skip_num" default="1"/>
+    <arg name="out_num" description="Int: maximum number of sample collect"/>
+    <arg name="skip_num" description="Int: number of the first few samples to neglect"/>
 
 
     <arg name="storage_id" default="sqlite3"/>