how to create a the launch file xml
i follow the tutorials to 2.3 The launch file .the tutorials just tell us to :"Now let's create a launch file called turtlemimic.launch and paste the following: "but it doesn't tell us how to create a launch file .so ,i really don't know where to past the scripts it provides :
<launch>
<group ns="turtlesim1">
<node pkg="turtlesim" name="sim" type="turtlesim_node"/>
</group>
<group ns="turtlesim2">
<node pkg="turtlesim" name="sim" type="turtlesim_node"/>
</group>
<node pkg="turtlesim" name="mimic" type="mimic">
<remap from="input" to="turtlesim1/turtle1"/>
<remap from="output" to="turtlesim2/turtle1"/>
</node>
</launch>
so ,could any can tell me how to create a launch file and where to paste the scripts .
Typically the .launch files stay inside a catkin package in the folder launch. Not sure if this is the answer that you pretend. If not please be more explicit