# Nathaniel Goldfarb

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Question

cannot extract data from figure with multiple lines

Hello, I have a matlab figure with muliple lines in it that I am trying to extact. However I can only get the figure line. I...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

match hardware update frequency in simulation

Hello, I am trying to tune my Simulink controller for a system I built. My communication speed is about 350Hz using Serial comm...

mer än 2 år ago | 1 answer | 0

### 1

answerQuestion

Control sending frequency for serial communication

I am trying to read/write data from an arduino over serial using Simulink. I am sending two floats down (as sin waves for now) a...

nästan 3 år ago | 0 answers | 0

### 0

answersQuestion

Synchronize Serial communication between simulink and Arduino

I am trying to build a model that sends two floats over serial to an arduino and waits for two values to be sent back. For now a...

nästan 3 år ago | 1 answer | 0

### 1

answerQuestion

Matlab crashes when using ROS toolbox

I am using the ROS toolbox along with the responce tool kit to optmize my controller. IT work most of the time but sometimes i g...

ungefär 3 år ago | 0 answers | 0

### 0

answersI want to optimize two parameters for my model

Yes You can use the responce optimization toolbox, you can then choose what varbiles you want to optimize

ungefär 3 år ago | 0

Question

variables only changing by small amount in response optimizer

I am trying to use the responce opertizer using Simplex method. The magntidue of my varibles is in 10^3 but they appear to only ...

ungefär 3 år ago | 0 answers | 0

### 0

answersQuestion

how does the scale parameter work in the response optimizer

I am trying to use the repsonce optmizer in simullink to optimze severla varbibles for my controller. My question is how does th...

ungefär 3 år ago | 0 answers | 0

### 0

answersQuestion

change search range of response optimization

I am trying to use the Responce Optimizer package in simulink. I set up the search range for my all my tuning design varibles. ...

ungefär 3 år ago | 1 answer | 0

### 1

answerWarning: Initializing MATLAB Graphics failed

I solve the problem by following this answer: https://www.mathworks.com/matlabcentral/answers/364986-matlab-error-graphic

ungefär 3 år ago | 0

| accepted

Question

Warning: Initializing MATLAB Graphics failed

I got the following error today when I restarted matlab and I am not sure how to fix it Warning: Initializing MATLAB Graphics...

ungefär 3 år ago | 1 answer | 0

### 1

answerno IP in Gazebo virtual machine

I was able to solve this problem using this: https://askubuntu.com/questions/1073031/ubuntu-18-04-internet-connection-not-wor...

ungefär 3 år ago | 0

| accepted

Question

no IP in Gazebo virtual machine

I was using the VM provided by Mathworks with not problem. When I booted it up today the VM did not have a IP address. I am no...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

Error:Brace indexing is not supported for variables of this type.

I am using the Responce optmization toolbox to optmize my controller and I am getting the following error: === Design Optimiz...

ungefär 3 år ago | 1 answer | 0

### 1

answerQuestion

optimization for reference tracking

Hello, I am trying to find optimal parameters for my sliding mode controller. I am using the Responce optimizer app to get t...

ungefär 3 år ago | 0 answers | 0

### 0

answerscommunicating with node in VM

Followed this to solve the problem: https://www.mathworks.com/help/ros/ug/get-started-with-gazebo-and-a-simulated-turtlebot.html...

mer än 3 år ago | 0

| accepted

Question

communicating with node in VM

I am having trouble communicating with my MATLAB ROS ndoe. I am deploying my node into my VM and trying to see the topic. While...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

Brace indexing is not supported for variables of this type in Simulink

I have been having a lot of trouble building and runing simulink models with custom messages. Nothing I seems to do works. It...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

Unrecognized message type in ros simulink

I am having problems building and running my simulink model. I am try using a custom message in a service but when I try to buid...

mer än 3 år ago | 1 answer | 0

### 1

answerspeed up ROS controller loop rate

Here is my model. Thankyou for all the help

mer än 3 år ago | 0

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

mer än 3 år ago

Question

speed up ROS controller loop rate

I am using a MATLAB 2021a. I made a sliding mode controller to control a robot in a simulation. I have been following severa...

mer än 3 år ago | 2 answers | 0

### 2

answersQuestion

measure the ROS loop time in simulink

I am trying to figure out my control loop time in simulink for controlling my simulation using MATLAB 2021a. I am using the loo...

mer än 3 år ago | 1 answer | 0

### 1

answerQuestion

ROS simulink controller is slow

I am trying to build a controller in simulink to interact with ROS and custom simulation of my robot. The controller is rather c...

mer än 3 år ago | 0 answers | 0

### 0

answersQuestion

custom ROS service bus assignment

Hello, I am trying to call a ROS service using a custom service message in simulink. I have successfuly followed the instr...

mer än 3 år ago | 1 answer | 0