has
Check if ROS parameter name exists
Description
Examples
Check If ROS Parameter Exists
Connect to a ROS network. Create a parameter tree and check for the 'MyParam'
parameter.
rosinit
Launching ROS Core... Done in 0.44963 seconds. Initializing ROS master on http://172.20.147.47:52282. Initializing global node /matlab_global_node_52183 with NodeURI http://dcc300956glnxa64:40729/ and MasterURI http://localhost:52282.
ptree = rosparam;
has(ptree,'MyParam')
ans = logical
0
Set the 'MyParam'
parameter and verify it exists. Disconnect from ROS network.
set(ptree,'MyParam','test') has(ptree,'MyParam')
ans = logical
1
rosshutdown
Shutting down global node /matlab_global_node_52183 with NodeURI http://dcc300956glnxa64:40729/ and MasterURI http://localhost:52282. Shutting down ROS master on http://172.20.147.47:52282.
Input Arguments
ptree
— Parameter tree
ParameterTree
object handle
Parameter tree, specified as a ParameterTree
object
handle. Create this object using the rosparam
function.
paramname
— ROS parameter name
string scalar | character vector
ROS parameter name, specified as a string scalar or character vector. This string must match the parameter name exactly.
Output Arguments
exists
— Flag indicating whether the parameter exists
true | false
Flag indicating whether the parameter exists, returned as true
or false
.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2019b
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