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Cam Salzberger


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MathWorks

371 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 can I create a custom ROS action server in MATLAB?
Currently, ROS Action Servers are not available in MATLAB, only ROS Action Clients. If you would like to create your own action ...

1 day ago | 1

| accepted

Answered
Undefined function 'readImage' for input arguments of type 'double'. in PickandPlaceWorkflowInGazeboUsingROSExample.mlx
Hello Viet, Techncially, "readImage" is a method for an object of class ros.msg.sensor_msgs.Image (and CompressedImage). There ...

10 days ago | 0

Answered
rosgenmsg(folderpath) from custom ros msgs add on causes Index exceeds the number of array elements (0).
Daniel, This kind of error message generally comes up (in any MATLAB product) when you are trying to call a function but have s...

10 days ago | 0

| accepted

Answered
matlab error on Ros custom message
Hello Matteo, I believe the issue here has to do with reason number 2 listed. Your package.xml file looks like it uses a mix of...

15 days ago | 1

| accepted

Answered
How does Robotics Toolbox connect to ROS?
Clayton, In previous releases of MATLAB, there was only the Robotics System Toolbox, which had some ROS and navigation applicat...

29 days ago | 0

Answered
Plotting every 2 columns as X,Y in a matrix
Hey Eric, This is pretty simple. The key to making it even simpler is this line in the plot documentation: "If X and Y are bot...

1 month ago | 0

| accepted

Answered
How to access all elements within a structured cell array without looping?
Hello Steve, I would suggest restructuring your data storage. If you did use the struct array method of storage, I believe it w...

1 month ago | 0

Answered
ROS Master is running. Can't run 'rosinit'
Hey Michael, It sounds like there is already a ROS Master running on your machine on the port 11311, but (probably) not having ...

2 months ago | 0

Answered
robotics system toolbox example issue
Hello Noah, The rigidBody function was renamed from robotics.RigidBody in R2019b. If you have an earlier release, you'll need t...

2 months ago | 0

Answered
Is it possible to Use MATLAB "toolbox/map" functions in an outside C++ program?
Michael, Sorry for my comment (now deleted). I re-read your question and understood what you are asking. I believe you should b...

2 months ago | 0

Answered
Why can't I use "rigidBodyJoint" function from Robotics System Toolbox?
Hello Elin, If you are looking at the documentation page for rigidBodyJoint in the current release (R2019b), there's a compatib...

2 months ago | 0

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Answered
Parameter server issues when started using rosinit
Hello Rushikesh, I'm not sure about the cause of this specific error, but my money is on version incompatibility in the use of ...

2 months ago | 0

Answered
why does matlab 2019a for Mac keyboard freeze in both editor and command window
Hey Greg, Some people in this thread commented on windows management software (like Magnet) causing this issue. Check out the c...

2 months ago | 0

Answered
function did not receive any data and timed out
After you create the subscriber "laser", does it receive any messages from the turtlebot? To determine this, you can check the L...

2 months ago | 0

Answered
How do I use the inputParser to validate my required input is a string from a defined set of acceptable strings?
Hello Bryan, validatestring doesn't return a logical matrix of validated values, it returns the full string that is matched. Wh...

2 months ago | 0

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Answered
Shrink size of body axes in show
Hello Jeff, I do not believe that there is currently an easy way to scale the reference frame coodinate-system indicators. You ...

2 months ago | 0

Answered
draw a label in the scatter graph
You can use the text function to put labels at x-y coordinates. Name-value pairs can be used to determine where to place the lab...

2 months ago | 0

Answered
ros custom messages not adding to rosmsg list
Hello Jacob, I have a few suggested solutions and trouble-shooting steps here. Did you restart MATLAB? That is necessary to loa...

2 months ago | 0

Answered
Problem to load a path
I haven't seen this before, though it looks similar to this issue with opening files. If I were to guess at a solution... This ...

3 months ago | 0

Answered
Newly installed 2019b does not open .fig files
Hey Brandon, It sounds like you are trying to open your figure files from outside of MATLAB (e.g. Windows Explorer), and it is ...

3 months ago | 0

| accepted

Answered
How to call variable (with index) using string?
Adam's suggestion really is the way to go about addressing the fundamental issue. In the meantime, if you want to get access to ...

3 months ago | 0

| accepted

Answered
Creating Pointcloud ROS message in Simulink
(Moved from comment to answer) This question about creating point cloud messages seems fairly similar, and the attached utiltie...

3 months ago | 0

Answered
Updating ros messages for moveit!
Hello Pouria, Unfortunately, the MATLAB ROS custom message capabilities currently only support the "format 1" style for the pac...

3 months ago | 0

| accepted

Answered
I got some errors when I closed GUI. How do I fix it?
Hey Aaron, The error is likely because the code is trying to execute after you closed the figure window. Closing the figure des...

3 months ago | 0

Answered
How can I assign different color and width in a subplot?
"hEB" doesn't seem to be assigned in the code snippet you posted. You're assigning "hEBA8", "hEBC5", and "hEBE1", but not the hE...

3 months ago | 0

Answered
Trying to connect to an active node [ROS2]
There are two different factors in determining what is and isn't within a ROS 2 network. The first is the domain ID, and the sec...

3 months ago | 0

Answered
HOW can I know the code of "prioEDF"which is used in the truetime-2.0?
It looks like TrueTime has a GitHub project where they keep their source code. I don't know if it's the latest, but it appears t...

4 months ago | 0

| accepted

Answered
robotics simulink simscape tools
Hello Janitha, I have limited experience with this, but I believe you should be able to use importrobot to get a RigidBodyTree ...

4 months ago | 0

| accepted

Answered
Change frame size in show(rigidbodyTree)
Hello Brian, If you don't have a mesh model to show on the robot, and only have the body lines, I believe you can get access to...

4 months ago | 0

Answered
Working with Ouster Lidar and pointcloud2
Hello Julien, I haven't tried the Ouster data, but there are two options when reading messages from rosbag: you can read them i...

4 months ago | 0

| accepted

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