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if you have only using one marker, with your camera try using the below command to fetch x;

msg->markers[0].pose.pose.position.x

if you want orientation, replace "position" with "orientation"

~~if you have only using one marker, with your camera try using the below command to fetch x;~~

~~msg->markers[0].pose.pose.position.x~~

if you want orientation, replace "position" with ~~"orientation"~~ "orientation"

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