change pcl_displayer's namespace to /
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@ -35,7 +35,7 @@ class Callback {
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main(int argc, char** argv)
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{
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ros::init(argc, argv, "pcl_displayer");
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ros::NodeHandle node("displayer");
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ros::NodeHandle node;
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// initialisation
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ros::Subscriber subscriber = node.subscribe<PointCloud>("input", 1, Callback());
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