常用的ros指令

I record some pretty useful and frequently-used ROS command here.

• rosnode list
  List all active nodes.

• rosnode info /your_node_name
  print information about node, such as the publishers and subscribers, and also thier message type!

• rostopic list
  Print information about all active topics.

• rostopic echo /your_topic_name
  Display the messages of this topic

• rqt_plot /your_topic_name (your_topic_name2 ...)
  Plot the data of this topic or these topics.

• When you want to plot the array like std_msgs::Float64MultiArray, you can do like this:
  rqt_plot /q_state/data[0]
  then you can plot the elements of your array~