Answered
how use MATLAB to data generation
Hello Dodo, Yes, if you are looking to evaluate the sine function at particular points, then export that data to an Excel sprea...

6 years ago | 0

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Answered
About team members in competition
Hello Sadashiv, MATLAB Answers is generally more about getting help with MATLAB code or usage from the community. To get help w...

6 years ago | 0

Answered
Inverse Kinematic Solver solutions
Hello Kyle, The inverse kinematics solver parameter AllowRandomRestarts is likely the culprit here. If you check the documentat...

6 years ago | 2

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Answered
Problems with ExampleHelperGazeboSpawnedModel ROS Kinetic on R2018b
What version of Gazebo are you using? The example helpers were designed for the purpose of working with the ROS Hydro VM and its...

6 years ago | 0

Answered
How to lock an area
If I'm translating this correctly, you want to bulk-comment something. You can highlight it all and comment each line at once wi...

6 years ago | 0

Answered
External ROS node can't communicate with simulink
Hey Mark, I usually see this kind of issue going the other way (external nodes unable to send data to MATLAB/Simulink), but it'...

6 years ago | 0

Answered
rosservice call not implemented
Hello Luca, The rosservice function is designed to give introspection information from the network about available services. Fo...

6 years ago | 0

Answered
Error in ROS Custom Message
Hey Shlok, I believe that the Simulink message type selection drop-down should use the same functionality as rosmsg("list"). I'...

6 years ago | 0

Answered
How can I change my ROS custom message after it's generated.
Hello Jaehyeon, The ROS custom messages supported by MATLAB are designed to be overwritten. So if you have gone through all of ...

6 years ago | 0

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Answered
Visualizing Robot using URDF format
Hello Prasanna, I can't claim to have experience with it, but I believe that you can use smimport to get the URDF into Simscape...

6 years ago | 0

Answered
How to get arrays of buses from message in ros subcribe in simulink and transfer to matlab function
Hello, You may need to manage your array sizes in Simulink ROS to allow the full number of points to be extracted from the arra...

6 years ago | 0

Answered
MATLAB unable to receive messages of a custom ROS message type
Hey Harvard, Now that things have been narrowed down, hopefully I can offer some potential solutions. One of the biggest causes...

6 years ago | 0

Answered
Fail to create ROS Publisher and ROS subscriber
Hello Ignacio, The message type "geometry_msgs/Twist" is one of the standard, built-in ROS message types. However, the message ...

6 years ago | 0

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Answered
Can Matlab search through the current directory to find and import a file?
Hey Noah, You can use the dir function to get information on the contents of a folder. You can use wildcards (* or **) to match...

6 years ago | 0

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Answered
How to change PointCloud2 Piont Data type？
The data type in the sensor_msgs/PointCloud2 ROS message type is hard-locked by the message definition. Note, however, that the ...

6 years ago | 0

Answered
Simulink Robotics System Toolbox
Hey Shundai, Have you gone through the custom message support workflow to add that message type to MATLAB? It is selectable, be...

6 years ago | 0

Answered
Data mismatch between ROS publisher and Simulink subscriber model
Hello Pavan, What is the difference between the two? What data is being stored (the whole ROS message, or an extracted data fie...

6 years ago | 1

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Answered
How can I handle the array type of ROS messages ?
Hello Jaehyeon, It looks like the std_msgs/Float64MultiArray should be able to handle the array of data you are looking to prov...

6 years ago | 1

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Answered
put a matrix as a variable in another matrix so i can access different matrixes
Hello Joris, As a quick-fix, you could make tn a cell array, containing the other matrices? tn = {th ho tm mi}; for n = 1:4; ...

6 years ago | 2

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Answered
Image format error when reading ROS compressed images
Hello Asanka, Any messages published by the image_transport package should ensure that the Format field is in the form expected...

6 years ago | 0

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Answered
What is the probability distribution used in PRM?
Hello Antonio, The PRM class uses a uniform sampling within the map limits (and free space) to do the path planning. There is c...

6 years ago | 0

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Answered
ROS node generated by MATLAB runs as a process in Linux ?
Hello Jaehyeon, ROS nodes, generated from Simulink or not, generally run as their own separate process. Certain operations will...

6 years ago | 0

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Answered
Why i am getting Nan?
Any time str2double is unable to translate a particular input into a number, it returns NaN. That is probably where the issue is...

6 years ago | 0

Answered
How to use rosgenmsg when package.xml file is in different directory and msg directory is in different directory?
Hello Milan, If you check out the example workflow and packages that are used in the custom message example here, you can see t...

6 years ago | 0

Answered
How to use rosgenmsg with a filepath on a separate computer?
Hey Theodore, Barring odd situations where you have other computer systems accessible through network paths ro the like, rosgen...

6 years ago | 0

Answered
How do I get readImage (ROS) to work?
Hello Ulrik, It's good that you are experimenting with the 'DataFormat','struct' option for extracting messages from rosbags, s...

7 years ago | 1

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Answered
Is it possible to convert .mat file into rosbag file? Is it possible to convert .avi file into .mat file in ROS?
Hello Subhash, There currently is no functionality in MATLAB for the creation of rosbag files. However, you could load the mess...

7 years ago | 0

Answered
How can I manage more complex ROS messages in Simulink? (e.g. JointTrajectory)
Hello David, You can create an empty message structure of your desired type using the Blank Message block, and fill in the valu...

7 years ago | 0

Answered
How can I write an app using matlab for my android phone, to communicate with an app that i created using app designer on my laptop?
The Android Support Package is good if you are looking to have two separate apps that manage their communication with each other...

7 years ago | 0

Answered
Getting the data from the rosbag msg, when the data is an array
Hello Bren, Rather than using timeseries, try using readMessages to extract messages from your rosbag selection object. Try it ...

7 years ago | 0