====== ROS Publisher Double ======
This block samples the signal at its input and packs it into a ROS message of type ''std_msgs::Float64''. Each time the block is run by its time domain, this message is published under a given topic name.
<code cpp>
  RosPublisherDouble pubDouble("myTopic"); // create publisher block
</code>

This block can be connected to any signal whose value has type ''double''. \\
IMPORTANT The time stamp of the signal is not transmitted.