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2016-05-26 00:21:58 -0500 | commented question | Why there are negative values in the diagonal of covariance matrix when I use laser_scan_matcher? This is a demo from laser_scan_matcher package, and the data used are provided with the package, not my data. However the covariance matries are weird. I want to know how to handle this kind of situation. |
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2016-05-25 03:12:21 -0500 | asked a question | Why there are negative values in the diagonal of covariance matrix when I use laser_scan_matcher? commands list $ roslaunch laser_scan_matcher demo.launch publishe_covariance:=true $ rostopic echo /pose_with_covariance and the outputs are: so my question is why there are negative values in the diagonal of covariance matrix? |