ravijoshi's profile - activity

duplicate of #q411723

I'm not sure if doing catkin_make will destabilize the things. You should create a new workspace and install all t

Hi, I want to read a file inside python script in ros indigo in the following way -

file_name = rospy.get_param("~file", None)

Below is the snippet of launch file -

<launch>
    <arg name="file"  default="$(find kinematics)/sample/joint_states.csv" />
    <arg name="animation" default="true" />  <!-- run animation -->
    <group if="$(arg animation)">
        <node pkg="kinematics" type="trajectory.py" name="trajectory_animation" respawn="true">
            <param name="file" value="$(arg file)" />
        </node>
    </group>
</launch>

While providing the file parameter as a command line argument, it says No such file or directory. Below is the output of terminal -

ravi@ravi-pc:~/ros_ws$ roslaunch kinematics baxter.launch file:=src/../../Desktop/joint_states.csv 
  File "/home/ravi/ros_ws/src/kinematics/src/trajectory.py", line 19, in __init__
    with open(file_name, 'r') as f:
IOError: [Errno 2] No such file or directory: 'src/../../Desktop/joint_states.csv'
ravi@ravi-pc:~/ros_ws$ ll src/../../Desktop/joint_states.csv
-rw-rw-r-- 1 ravi ravi 179308 May 19 20:46 src/../../Desktop/joint_states.csv
ravi@ravi-pc:~/ros_ws$ roslaunch kinematics baxter.launch file:=src/kinematics/sample/joint_states.csv
  File "/home/ravi/ros_ws/src/kinematics/src/trajectory.py", line 19, in __init__
    with open(file_name, 'r') as f:
IOError: [Errno 2] No such file or directory: 'src/kinematics/sample/joint_states.csv'
ravi@ravi-pc:~/ros_ws$ ll src/kinematics/sample/joint_states.csv
-rw-rw-r-- 1 tom tom 179308 May 19 20:46 src/kinematics/sample/joint_states.csv

@oferbar: I remember verifying the code. As per my comments, you can noticed that it worked fine. I suspect something wr

Why do you want to use sys args ? ROS params are made for that! May I request you to share your use case, please?

@akumar3.1428: Please be more specific and always show your progress first. Moreover, you can find many blogs on the int

how to properly send parameters ... Please see how turtlesim_node_with_parameters is defined: https://docs.ros.org/

Try compiling roscpp_tutorials . If you face the same problem, please reinstall ROS!

I wanted to replicate your errors, so I built your package locally. Before that, I disabled start_world and spawn. The b

I am glad you made it work!

How can I pass the image topic to RVIZ as an argument, so that the RVIZ will be able to show the topic on an image pa

Troubles compiling because of realsense library I am using ROS Noetic on Ubuntu 20.04 to control the openManipulator-X w

All the indentations are correct. In your original post, they were definitely incorrect. cannot get the joint

subscriber class not returning value Here is code class Robotreacher(object): def __init__(self): #rospy.in

I can't try it right away, but I will certainly try it soon. Does it work?

I used this first but it didn’t worked so I git clone the v_2 plugins from the same.... Do you mean that initially,

I used this first but it didn’t worked so I git clone the v_2 plugins from the same.... Do you mean that initially

The compiler is unable to find roscpp. Can you please post a link of the documentation you followed for the installation

rosbag2_bag_v2 plugins Hello, I am trying to install rosbag2 plugin. While doing that, I am facing this error:- tarti

It seems to be an installation issue. Can you please share a link of the documentation you followed for the installation

Plugin is unable to load .so file Hi, I am trying to run the turtlebot3 in the gazebo using plugins but facing an error

Combination of timer and subscriber Hello, I am currently struggling to write a node for synchronous processing while su

Combination of rosTimer and rosSubscriber Hello. - Hello. I am currently struggling to write a node for synchronous proc

It would be nice to share a minimal reproducible example

I am glad that you made it work. Sometime, creating a " minimally reproducible example" helps to filter the issue, as yo

I am glad that you made it work. Sometime, creating a " minimally reproducible example" helps to filter the issue, as yo

Please see the "Update" section in my answer above. Basically, it works fine with your parameters as well. However, in y

I believe the error is coming due to an incorrect installation of trac_ik. To answer you completely, I tested it in ROS

... does not happen with the ROS Melodic Most probably because the trac_ik is not install correctly in the Noetic v

... does not happen with the ROS Melodic Most probably because the trac_ik isn't install correctly in the Noetic ve

Can you please provide a link to documentation you followed? Please mention the commands you tried.

I believe the error is coming due to an incorrect installation of trac_ik. To answer you completely, I tested it in ROS

I believe the error is coming due to an incorrect installation of trac_ik. To answer you completely, I tested it in ROS

Error when initializing TRAC-IK on ROS Noetic Hi! I have used TRAC-IK on ROS Melodic and Kinetic and everything works f

I am sorry for the misunderstanding. I was answering another question which was tagged as ROS 2. Please ignore 1 and 2.

Please declare the Synchronizer as a class member. At present, it is a local variable. See this answer for more details.

I am glad you made it work!

I wonder how did you compile the above code. The compiler should have shown errors. Anyway, please read below: Please