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Cam Salzberger


MathWorks

317 total contributions since 2015

I am a Software Engineer at MathWorks, and a Mechanical Engineer by education. I specialize in Robotics.

In my free time, I enjoy hiking and parkour.

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Contributions in
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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...

7 days 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...

7 days 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 ...

7 days 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...

12 days 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 ...

12 days 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...

14 days 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...

21 days 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...

1 month ago | 1

| accepted

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; ...

1 month 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...

1 month 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...

1 month 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...

2 months 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...

2 months 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...

2 months 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...

2 months 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...

2 months 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...

3 months 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...

3 months 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...

3 months 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 ...

3 months ago | 0

Answered
Best way to shutdown ROS when used with MATLAB Compiler
Hello Andreas, Instead of an infinite loop, an alternative design pattern you could try is to run the publishing within a timer...

3 months ago | 0

Answered
ROS Subscribe Block - Signal Selector
Hey again, Ben, The issue is that the Markers_ field is, presumably, an array. For a MATLAB equivalent, it'd be like if you had...

3 months ago | 0

Answered
Why MATLAB can not start on Ubuntu 18.04?
Hello Ye, This answer provides a good starting point for troubleshooting these types of issues. Beyond that, contacting MathWor...

3 months ago | 0

Answered
Using Vicon Data from ROS and feed it to the Mambo Parrot Drone Flight Control System in Simulink
Hello Ben, If you have the Vicon pose estimate coming in over your ROS network, you can access it directly in Simulink through ...

3 months ago | 0

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Answered
How can I use user defined type message in rossubscriber?
Hello Yun, For any non-standard (non-built-in) message types, you can make them available for use in MATLAB by using the Custom...

3 months ago | 0

Answered
Efficient way to connect based on n x 2 array
Hello Olli, Consider looking into various graph search algorithms, as that is exactly the field that explores "doing this effic...

3 months ago | 0

Answered
Convert Binary Occupancy Grid to logical or numeric values
Hello Mohammed, You can use the occupancyMatrix method to extract the numeric values of the occupancy grid. Then you can manipu...

3 months ago | 0

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Answered
Not able to run multiple node scripts at once
Hello Matthias, I am a little confused about exactly what it is you are trying to do. In general, ROS nodes (and publishers and...

4 months ago | 0

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Answered
Blank messages in multiple model reference instances
Hello Chris, As of R2018b, Simulink does not yet support the use of ROS blocks within reference models. If you need to operate ...

4 months ago | 0

Answered
hii, in ROS toolbox can I use single ROS Publish block to connect multiple ROS Subscribe blocks??
Yes, ROS works by publishing a message on a topic, and all subscribers to that topic will receive the message. So using one publ...

4 months ago | 1

| accepted

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