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Cam Salzberger


MathWorks

303 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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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...

5 days 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...

10 days ago | 1

| accepted

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...

13 days 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...

13 days 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...

13 days 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 ...

26 days 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...

29 days 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...

1 month 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...

1 month 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 ...

1 month ago | 0

| accepted

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...

1 month 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...

1 month 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...

1 month ago | 0

| accepted

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...

2 months ago | 0

| accepted

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 ...

2 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...

2 months ago | 1

| accepted

Answered
Error using ExampleHelperGazeboCommunicator/startModelServices (line 334)
Hello Santiago, The md5 checksum having a different value is indicating that the ROS message does not match the expected messag...

2 months ago | 0

Answered
how to convert image(basically a floor plan ) into map or binary text file??
Hello Vivek, The robotics.OccupancyGrid class has an example that shows the conversion of a PGM image into an occupancy grid. J...

2 months ago | 1

Answered
How do read .npy files in matlab?
Hello Juan, I don't believe that either of those file formats are natively supported in MATLAB, but you can always check File E...

2 months ago | 0

Answered
matrix in app designer ?
You can create a uitable, and provide the app handle as the first input argument to it. The matrix can be provided in the 'Data'...

2 months ago | 1

| accepted

Answered
Error while Reading a image inside a user defined function
Hello Prayag, MATLAB does not use curly braces { } to demark functions, loops, conditionals, or other code blocks. Instead, MAT...

2 months ago | 1

| accepted

Answered
Solve linear equation with added constant
Hello Gordon, Since C is unknown, and a scalar, you could simply consider it to be an extension of the unknowns of x. So instea...

2 months ago | 0

| accepted

Answered
Robotics toolbox Custom map compile error
Hello Divyanshu, Does your MAT file have a variable in it called "simpleMap"? Because that is what the code is looking for - a ...

2 months ago | 1

Answered
How to save stats values from matchScans?
Hello Amrik, Yes, your code is close to what you are looking for, but you are replacing the value of Score every loop iteration...

3 months ago | 0

| accepted

Answered
How to rectify the frame rate drop that occurs while subscribing to the topic of camera image from ROS in Simulink ?
Hello Arun, There are two major potential sources for the delay that I can think of offhand. One is that using subscribers on t...

3 months ago | 0

Answered
How can I load, read and save ros ".msg" file by Matlab?
Hello David, If you are simply looking to import the text from ROS message files, then possibly write it back out into a differ...

3 months ago | 2

Answered
Robotics.particle filters does not work
Hey Matteo, Just looking at the code has a few things that call out to me. I'm not sure what the selectBox call is, but can you...

3 months ago | 0

Answered
Subscribe the topic /robot/joint_states ,but i get l_gripper_l_finger_joint message.
Well, I was hoping to get your overall workflow so that I could suggest something that would fit in with it. However, the simpli...

3 months ago | 0

| accepted

Answered
Cannot connect to ROS master and connect my Baxter robot...
Hey John, Sorry, I just was answering your other question with general strategies, but it looks like you've at least tried some...

4 months ago | 0

| accepted

Answered
Can MATLAB control the real Baxter robot in real time? and can the VMware also control the real robot and how?
Hello John, If you are having difficulty connecting to a ROS Master, first always check that the ROS Master is running, and tha...

4 months ago | 0

| accepted

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