Hi, I'd suggest the Float64MultiArray message (in std_msgs). I don't know of any conversion function that exists for Python yet. -Stu On Mon, Jun 14, 2010 at 3:52 PM, James Bowman wrote: > You can turn the numpy array into a single-channel CV image, then use > cv_bridge to turn it into a message: > > msg = CvBridge().cv_to_imgmsg(cv.fromarray(a)) > > and: > > a = numpy.fromarray(CvBridge().imgmsg_to_cv(msg)) > > > On Mon, Jun 14, 2010 at 3:27 PM, Ken Conley wrote: >> >> The ROS msg IDL only supports 1D arrays. The reshape approach is the >> correct approach to ensure compatibility in multiple languages. >> >>  - Ken >> >> On Mon, Jun 14, 2010 at 3:23 PM, Floris van Breugel >> wrote: >>> >>> Hi folks, >>> >>> Is there a way to publish 2D numpy arrays as messages (using python)? I >>> went through the numpy tutorial for rospy but it seems to only work for 1D >>> arrays. I suppose one could reshape the 2D array to be 1D, and pass the >>> shape as another message, and then reconstruct it on the other side, but >>> maybe there's a more efficient way to do it? Or that functionality could be >>> added to numpy_msg.py? >>> http://www.ros.org/wiki/rospy_tutorials/Tutorials/numpy >>> >>> Thanks! >>> >>> - Floris >>> >>> >>> >>> -- >>> Floris van Breugel >>> Caltech Graduate Student >>> Control and Dynamical Systems >>> (925) 963 8280 >>> >>> Wildlife and Landscape Photographer >>> Galleries: http://www.ArtInNaturePhotography.com/ >>> Blog: http://www.ArtInNaturePhotography.com/wordpress/ >>> 2010 CALENDARS! Now available on my website! >>> >>> >>> _______________________________________________ >>> ros-users mailing list >>> ros-users@code.ros.org >>> https://code.ros.org/mailman/listinfo/ros-users >>> >> >> >> _______________________________________________ >> ros-users mailing list >> ros-users@code.ros.org >> https://code.ros.org/mailman/listinfo/ros-users >> > > > > -- > J. > > > _______________________________________________ > ros-users mailing list > ros-users@code.ros.org > https://code.ros.org/mailman/listinfo/ros-users > > -- Stuart Glaser sglaser -at- willowgarage -dot- com www.willowgarage.com