Josh Chen
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10 of your answers have been accepted
Awarded to Josh Chen on 12 Sep 2022
Contribute at least one answer each month for 6 consecutive months
Awarded to Josh Chen on 02 Jun 2022
Answer 3 questions that were unanswered for more than 30 days
Awarded to Josh Chen on 22 Jan 2021
Provide your first answer ever to someone else's question
Awarded to Josh Chen on 26 Oct 2020
Content Feed
how to convert .bag file into .pcd in matlab (Lidar Data) ?
Hi Dayananda, To achieve this with MATLAB, you would need both ROS Toolbox license and Computer Vision Toolbox license. You can...
1 month ago | 0
| accepted
ROS2 subscribe IsNew output remains true even if no new messages are received
Hello Callum, This is a known issue in 2021b and earlier version of MATLAB. Please update your MATLAB to at least 2021b Updat...
1 month ago | 0
| accepted
Matlab fails to see nodes in Gazebo VM
Hi Oren, Can you provide more information about the VM you are using here? Are you using the VM from MathWorks? If yes, which ...
1 month ago | 1
| accepted
Automated Parking Valet with ROS 2 in Simulink example errors out during model update
Recent change in GNU turned "--as-needed" for ld as default, which causes this issue. To address this, open the model "ROS2Vale...
2 months ago | 0
| accepted
Question
Automated Parking Valet with ROS 2 in Simulink example errors out during model update
I open the model from Automated Parking Valet with ROS 2 in Simulink example and use "Ctrl+D" to update it. However, I got the f...
2 months ago | 1 answer | 0
1
answerHow to input bus data (values) into my simulink model?
Hey Timo, If you have that bus/struct saved in Data dictionary, you should be able to bring it to MATLAB with "Simulink.data.di...
2 months ago | 1
Error occurs when executing 'rosinit'
Hello Ryo, Before running "rosinit", have you used "ROS Toolbox Preference" to setup the environment? In there, if there is any...
2 months ago | 0
ROS Toolbox read scan block ouput zero all the time.
Hi Zike, It does not matter if you have a "stop" or not in the Simulink model. When referring to the comment on the read-scan ...
2 months ago | 0
Error when trying to set the Path for python executable for ROS toolbox preferences
Hello Nabil, Sorry about the confusing error message, team is working on improving this error message. As for now, please try ...
2 months ago | 0
Fail to list ros2 topics when ubuntu publish topics with same ros_domain_id and same subnet.
Hi Jingyu, I hope you've found a solution to this issue. If not, please also feel free to also reach out to our techinical supp...
3 months ago | 0
Data from Simulink does not update ROS2 topic
Hello Renzo, When publishing messages with vector fields in Simulink, Simulink needs to know the length of valid data in those ...
3 months ago | 1
| accepted
Issue with libstdc++.so.6, when starting code generation.
Hello Mirhad, You may consider updating MATLAB to R2022b Update 2. This issue should be resolved after updating MATLAB. Besi...
3 months ago | 0
Issue in publishing ROS topic to another PC
Hello Kazuo, The environment variable configuration you shared looks correct to me. I suspect this may still have something to...
4 months ago | 0
| accepted
Error in Using ROS Topic
Hi Shivam, The topic "/gazebo/ModelState" contains only one "Pose" field, while the topic "/gazebo/ModelStates" that you are us...
4 months ago | 0
ROS2 Subscriber Callback Function Arguments for Code Generation
Hello Michael, This is a known issue in code generation with ros2subscriber callback. Sorry about the inconvenience caused by t...
5 months ago | 0
| accepted
Generated ROS node from Simulink, does not work on the target ROS device when launching it manually from Linux terminal without Simulink
Hi JF, Other quick things to try are: 1. Check whether the Gazebo world has been reset or not. Sometimes you may need to reset...
5 months ago | 0
Unable to run the simulink on ROS device due to administrative privileges issue
Hello Sandesh, This is a suggested action instead of an error. It should not prevent you from generating a ROS node or deployin...
5 months ago | 0
| accepted
How to make ROS subscribe block ensure that each message of a customized ROS topic is caught from Gazebo
Hi Hirak, If I understand correctly, you are running the Simulink controller through Simulink simulation instead of code gene...
5 months ago | 0
Select Node name created by ROS Toolbox on Simulink at master connection
Hello Jesús, As you may've discovered, the name of ROS node created from a Simulink model is auto generated with the pattern as...
7 months ago | 0
| accepted
How do I use a ros2 discovery server in matlab
Hi Samuel, I just tried this on my end and it works fine as shown below: sub3 was created with a node when "ROS_DISCOVERY_SE...
7 months ago | 0
How to access instance of class in ROS2 subscriber callback?
Hello Kyösti, Using a single object to manage both data and callback for subscriber is feasible. In this case, subscriber callb...
8 months ago | 0
ROS toolbox stuck on service call
Hi Kyösti, The code looks correct for me except "res" should probably be "response". But I don't think that is the culprit. I ...
8 months ago | 0
| accepted
when i creat a ros2 node ,it dosn't work.why 'Input data can only contain ASCII characters' ?
Hello Xin, I tried the same command you posted here on my end and it successfully created a ROS 2 node. As Walter mentioned, t...
8 months ago | 0
Incorrect image encoding from ROS and Raspicam
Hello Sebasian, Could you elaborate about what you mean by "VariableSize property from encoding arrey to rgb (1280x960x3)"? I a...
8 months ago | 0
Compatibility ros2node with Coder Generation
Hello Michael, You are right. Code generation support for 'ros2node' starts at R2021b. You should be able to use this feature ...
11 months ago | 0
| accepted
Questions about ros2 call service blocks in simulink
Hello Xiaochen, It is difficult to figure out the culprit from the screenshot of the model. However, I do have some troubleshoo...
11 months ago | 0
ROS2: How to generate code without makefile execution using Matlab coder
Hello Marek, Thanks for bringing this to our attention! This is a bug in both ROS and ROS 2 MATLAB code generation. We are curr...
11 months ago | 0
| accepted
Error in building custom ros messages
Hello Mustafa, Looking at the error message, it seems that the python virtual environment was not been created properly. Could ...
12 months ago | 0
Creating Custom ROS2 message types for simulink
Hello Andre, When running "ros2 msg list", are you able to see the custom message you are trying to use? If not, you would need...
1 year ago | 0
vision.blobanalysis used in ROS code generation does not support dynamicMemoryAllocation for AllVariableSizeArrays, but needed for ROS code gen
Hello Matthew, Since the "step" function does not want "unbounded" input, one idea that worth trying is to create an empty fixe...
1 year ago | 0
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