Need help with passing parameters to a launch file.

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I would like to over ride rtabmap parameters on a rosrun command line....I want to used the unaltered rtabmap launch file overriding some of the Grid parameters. Can this be done from the command line? If not is there a way to call rtabmap with include from another launch file and do this I do not want to cop and modify the launch file. I can not seem to get any solution on this. Thank you for your time.

The below code does not work.

roslaunch rtabmap_ros rtabmap.launch rtabmap_args:="--delete_db_on_start" depth_topic:=/zed/depth/depth_registered frame_id:=base_frame approx_sync:=false visual_odometry:=false odom_topic:=/zed/odom camera_info_topic:=/zed/rgb/camera_info rgb_topic:=/zed/rgb/image_rect_color  rtabmapviz:=false Grid/MaxGroundAngle:=45.0 Grid/MaxObstacleHeight:=2.0

I tried setting inside a launch file:

<!-- rosparam command = "load" file = "$(find my_package)/example.yaml" / -->  
<param name = "/rtabmap/Mem/IncrementalMemory" type = "bool" value = "false" />  
<param name = "/Mem/IncrementalMemory" type = "bool" value = "false" /> 

<include file="$(find rtabmap_ros)/launch/rtabmap.launch"/>

<param name = "/rtabmap/Mem/IncrementalMemory" type = "bool" value = "false" />  
<param name = "/Mem/IncrementalMemory" type = "bool" value = "false" />

But the rtabmap keeps setting values to true.

[ INFO] [1529896284.763605800]: Setting RTAB-Map parameter "Mem/IncrementalMemory"="true"
[ INFO] [1529896284.764360510]: Setting RTAB-Map parameter "Mem/InitWMWithAllNodes"="false"

even though

rosparam list | grep Incr

/Mem/IncrementalMemory
/rtabmap/Kp/IncrementalDictionary
/rtabmap/Kp/IncrementalFlann
/rtabmap/Mem/IncrementalMemory
/rtabmap/rtabmap/Mem/IncrementalMemory