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**Content Feed**

Changing plot line colour with multiple data sets

Create a color map and then give each one a distinct color. figure; thecolors = parula(9); for i = 1:9 plot(rand(5,1),r...

22 días ago | 0

| accepted

How to write an if-else statement for a function

if n>1 f = sqrt(1 + f(n-1)); elseif n == 1 f=2; else f = NaN; end

alrededor de 1 mes ago | 0

How can i make an Audio File loop continuously?

Have you read this article? <https://www.mathworks.com/help/audio/gs/real-time-audio-in-matlab.html Real-Time Audio in MATLAB> ...

alrededor de 1 mes ago | 0

| accepted

Why do I receive this error while using a MATLAB help example?

This ran fine on my machine. See below. What version of Matlab are you using? Maybe an older version that doesn't support struct...

alrededor de 1 mes ago | 1

Question

Code Generation Handle Object Not Defined for All Execution Paths

I have a problem where I am using a custom handle class that is allocated within an infinite while loop. At the end of each iter...

alrededor de 1 mes ago | 1 answer | 0

### 1

answerConvert striaght lines to smooth curves

It looks like your sample rate was too low. I'd recollect the data at a higher sample rate. You could try doing a cubic spline...

alrededor de 1 mes ago | 1

| accepted

I need help with Matlab - FFT - getting pairs of peaks-freq in array - urgently need help

I think you need to specify the x locations (frequency in your case) in the findpeaks function, otherwise it just gives you the ...

alrededor de 1 mes ago | 0

| accepted

Question

Best Ways to Save Objects with Coder Support

I have a couple of custom classes I've made for my project and I am using Coder to run my code as an executable. I am processing...

alrededor de 1 mes ago | 1 answer | 0

### 1

answerQuestion

Typecast a hex string to single

I have strings of hex values that I need to typecast to single precision values. I don't actually care about the actual single p...

alrededor de 2 meses ago | 1 answer | 0

### 1

answerundefined function error for builtin toolbox function

Did you install that toolbox when you installed Matlab? If not, run the 2021b installer again and only select the Image Processi...

3 meses ago | 0

| accepted

When I try to generate C++ code for generalizedInverseKinematics I get the following error Dimension 2 is fixed on the left-hand side but varies on the right ([1 x 8] ~= [1 x

@Aravindh Deiva G, I looks like you are trying to save the output of the validatestring function over the entries in value,...

3 meses ago | 0

Question

Deploying ROS2 Node with Custom Messages

I have Matlab code that includes a ROS2 node/publisher. I want to publish custom messages. This works when I run it natively in ...

3 meses ago | 1 answer | 0

### 1

answerFind matching small matrix in larger matrix

An admittedly brute force approach, but Matlab doesn't have a built in method for finding patterns in an array/matrix (at least ...

3 meses ago | 0

| accepted

Vectorize comparing a column vector in a matrix to all other vectors in the matrix.

You can use repmat.m to make a matrix of the same size. a = A.a - repmat(A.a(:,1),1,size(A.a,2)) b = A.b - repmat(A.b(:,1),1,s...

3 meses ago | 0

Filter design to remove noise

Are you talking about the high frequency stuff? Try lowpass.m

3 meses ago | 0

Error in 'udp/UDP Receive': Received a fractional-length packet for the specified data type.

I've had this issue before and it was related to the port already being used by another process. You may want to change you port...

3 meses ago | 0

Question

Current Directory for Generated Code

pwd Doesn't seem to be supported for code generation. How might one get the current directory when deploying code with code gene...

3 meses ago | 1 answer | 0

### 1

answerHow can I set up unequal bin widths in a histogram?

Check out the 'BinEdges' argument. blah = randi(20,1000,1); histogram(blah,"Normalization","probability","DisplayStyle","bar"...

3 meses ago | 1

| accepted

Question

Properly Disconnect from ROS2 Network with Generated Code

The Matlab ROS2 publish/subscribe documentation suggests using clear to remove the sample nodes, publishers and subscribers from...

4 meses ago | 1 answer | 0

### 1

answerQuestion

How to Flush Input Buffer for dsp.UDPReceiver

I am using dsp.UDPReceiver objects in my code. There are times when I put my code into an idle state. When I transition back to ...

4 meses ago | 0 answers | 0

### 0

answersHow do I pre-allocate memory for a structure?

Repmat offers another solution for preallocating structures: https://www.mathworks.com/help/simulink/ug/defining-arrays-of-stru...

4 meses ago | 0

Object Arrays in Code Generation

The answer is that it does not support object arrays. Here is the workaround https://www.mathworks.com/help/coder/ug/resolve-er...

4 meses ago | 0

| accepted

Question

Object Arrays in Code Generation

Does code generation support arrays of custom objects? Here is a simple class. classdef MyClass properties value...

4 meses ago | 1 answer | 0

### 1

answerCode Generation Segmentation Fault

I figured out the problem. In my code, I has a relative path that pointed to a configuration file my code needed that used to be...

4 meses ago | 0

| accepted

Question

Code Generation Segmentation Fault

I am trying to generate an executable from my Matlab Code. I have done this in the past with this same codebase and it worked fi...

4 meses ago | 1 answer | 0

### 1

answerROS2 Bag Writer?

I appears as though this wasn't supported for R2022a, but the prerelease of R2022b has a new function ros2bagwriter object: http...

4 meses ago | 0

| accepted

Question

Error recovery (try/catch) for Code Generation

What is the best way to implement error handling for Matlab code that I plan to deploy to C/C++ so that my code doesn't crash if...

4 meses ago | 0 answers | 0

### 0

answersQuestion

ROS2 Lifecycle Node Example

I am trying to build a ROS2 node in Matlab that is compliant as a life cycle managed node. I am having trouble understanding how...

4 meses ago | 1 answer | 0

### 1

answerQuestion

Use ROS2 Launch File to Run Multiple Instances of Matlab Generated ROS2 Nodes

I have generated and succesfully deployed a ROS2 node that publishes simple messages from my Matlab code. I can run this on my t...

4 meses ago | 1 answer | 0

### 1

answerCompatibility ros2node with Coder Generation

FYI for anyone in the future: A quick way to see how to use command line code generation if you are used to using the Coder App ...

5 meses ago | 1