From Michal Staniaszek via ros-users@
Version 1.8.9 of the diagnostics package (Indigo and later) has some new functionality for the diagnostic aggregator. You can now change the diagnostic aggregator at runtime by dynamically loading or unloading diagnostic analysers. This can be done by including a node in launch file, or directly from code if you require more control. The intention of the change is to give more flexibility to the aggregator, allow individual packages to specify the analysers that they need, and reduce clutter in the diagnostic aggregator GUI.
Please see the tutorial for examples and more information.
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