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2014-04-06 21:15:57 -0500 commented answer How can I use bag file data in Matlab?

Could you please show how to open that text file in Matlab? None of the tutorials helped me solve this

2014-04-06 18:11:42 -0500 asked a question How to get markers pose in a file?

Hi, I am using different AR tags and need to know how I can save their poses into a text file so I can use their poses in a MATLAB code. When I use "echo", it gives me a long list with different markers_id and the poses are not fixed. Any suggestion? Thanks

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2014-03-31 22:22:00 -0500 answered a question Are there any books on ROS?

This book is very helpful for beginners www.cse.sc.edu/~jokane/agitr/

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2014-03-31 22:20:30 -0500 answered a question I need some recomendations about ros

This book is very helpful for beginners www.cse.sc.edu/~jokane/agitr/

2014-03-31 22:08:49 -0500 answered a question rosnode list for not active nodes

to see the list of the available nodes in a package, do : $ rosrun [package_name] and hit "tab key" twice without hitting return key. ex: rosrun turtlesim "tab key" twice

2014-03-31 22:04:59 -0500 commented answer rosnode list for not active nodes

This is correct. I got the -1 vote for the previous answer which was incorrect. Sorry

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2014-03-31 18:02:35 -0500 answered a question rosnode list for not active nodes

to see the list of the available topics in a package, do : $ rosrun [package_name] and hit "tab key" twice without hitting return key. ex: rosrun turtlesim "tab key" twice

2014-03-30 23:35:17 -0500 commented answer Are there any books on ROS?

I have found a book that is for very beginners. It helped me clarify some ambiguities, and you can download it for free from this link : http://www.cse.sc.edu/~jokane/agitr/ Hope it helps

2014-03-30 21:22:57 -0500 asked a question Detecting AR tags

Hi, I'm new to ROS and I am trying to make a Pioneer 2 robot move through different points on a map. The first thing I need to do is to place AR tags on the floor and, using a USB/Wireless camera, being able to detect their coordinates so I can make my robot travel. I have found some packages such as uvc_camera and ar_track_alvar but couldn't figure out how to write a code to make this happen. Does anyone have some code examples so I can figure this out and move on? Thank you

2014-03-30 20:58:38 -0500 commented question ar track alvar - how to detect custom IDs

Hi, I'm a beginner in ROS that I need it for my project. Is there a tutorial that explains how to 1-connect camera to ROS in order to see the frames captured. 2-Identify the AR Tags I'm looking for some code examples. I only found one that deals with CUBE/SPHERE...etc. Nothing about codes that detects AR tags. Thank you

2014-03-30 20:58:20 -0500 answered a question ar track alvar - how to detect custom IDs

Hi, I'm a beginner in ROS that I need it for my project. Is there a tutorial that explains how to 1-connect camera to ROS in order to see the frames captured. 2-Identify the AR Tags

I'm looking for some code examples. I only found one that deals with CUBE/SPHERE...etc. Nothing about codes that detects AR tags.

Thank you

2014-03-26 20:48:03 -0500 commented answer rqt_plot not plotting data

I have the same problem. The plot window pops-up but no plot. My turtle keeps turning around... it is about to pass out, LOL I'm using the hydro version and unfortunately I couldn't figure out what the answer says. Please help!!

2014-03-26 20:47:20 -0500 answered a question rqt_plot not plotting data

I have the same problem. The plot window pops-up but no plot. My turtle keeps turning around... it is about to pass out, LOL I'm using the hydro version and unfortunately I couldn't figure out what the answer says. Please help!!