arp's profile - activity

Hi,

I have a registered point-cloud as PCD file. I want to convert it into octree representation. There are two ways I could go. The first one is by using PCL. The second method by using octomap. Is there any difference between them? Which one should I choose? How could it be done using octomap?

Greetings

Hi,

I am using the LMS1xx driver package for the LMS100 I have. The scan angle of the laser is 270 degrees. I want to reduce the scan angle of LMS100 to less than 180 degrees. Can the laser filter package do it? Or can it be done from the LMS1xx package itself?

Hi,

I am trying to install ros on a slackware based distribution. I am following the instructions given on this page http://wiki.ros.org/indigo/Installati...

I am trying to do a staged installation. i.e. first I install in a temporary directory temp/opt/ros/indigo and then copy the resulting temp/opt/ros/indigo/ folder to the /opt/ros/indigo folder. I am able to compile ros without problems.

I source the setup.bash file from /opt/ros/indigo/ after that.

roscore also runs fine.

But when I run rostopic

I get the Error.

Traceback (most recent call last):
  File "/opt/ros/indigo/bin/rostopic", line 35, in <module>
    rostopic.rostopicmain()
  File "/opt/ros/indigo/lib64/python2.7/site-packages/rostopic/__init__.py", line 1752, in rostopicmain
    import rosbag
  File "/opt/ros/indigo/lib64/python2.7/site-packages/rosbag/__init__.py", line 33, in <module>
    from .bag import Bag, Compression, ROSBagException, ROSBagFormatException, ROSBagUnindexedException
  File "/opt/ros/indigo/lib64/python2.7/site-packages/rosbag/bag.py", line 64, in <module>
    import roslz4
  File "/opt/ros/indigo/lib64/python2.7/site-packages/roslz4/__init__.py", line 33, in <module>
    from _roslz4 import *
ImportError: No module named _roslz4

All other commands seem to have no problems. But the ros-commands where _roslz4 is imported the above error comes up.

In the example where you remap the topic from chatter to foobar, the node is of type talker and it's name is "talker". Can I change the node-name "talker" to "speaker"??

Just to clarify. I am trying to rename a node after launching not the topics.

I commented the remapping so file looks like:

<launch>
  <node pkg="turtlebot_teleop" type="turtlebot_teleop_key" name="turltebot_teleop_keyboard"/>
</launch>

I includeed this launch file and tried your answer and it does not rename the node. Does that mean I can't rename nodes?

It still does not work. I am using hydro on Ubuntu 12.04. The output of rosnode list is

/rosout
/turtlebot_teleop_keyboard

Hello,

What would be the correct way to cite to ROS-wiki? In a bibtex entry who should the author be, since it a community wiki?

Regards

Hi, I would like to rename a node from a launch file which includes other launch file. Is it possible?? If yes then how is it done.

Here is a launch file I am using. The included launch file names the node as turtlebot_teleop_keyboard. I want to rename the node launched in the included launch file. The following launch file does not rename the node.

<launch>
     <include file="$(find turtlebot_teleop)/launch/keyboard_teleop.launch"/>
     <remap from="turtlebot_teleop_keyboard" to="teleop"/>
</launch>

Should I convert the above as answer? I have still not figured out how to make it work by just adjusting the PYTHONPATH. It works though, just by moving the _roslz4.so shared library.

Ok. I got it working by moving the shared library _roslz4.so to <prefix>/lib64/python2.7/site-packages/ roslz4/. I was wondering shouldn't python look for for _roslz4.so once <prefix>/lib/python2.7/site-packages is on the PYTHONPATH??