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Michael


Northern Arizona University

Last seen: 4 days ago Active since 2013

Programming Languages:
MATLAB

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Answered
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...

14 days ago | 0

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Answered
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

26 days ago | 0

Answered
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> ...

30 days ago | 0

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Answered
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...

1 month 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...

1 month ago | 1 answer | 0

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answer

Answered
Convert 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...

1 month ago | 1

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Answered
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 ...

1 month ago | 0

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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...

1 month ago | 1 answer | 0

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answer

Question


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...

1 month ago | 1 answer | 0

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Answered
undefined 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...

2 months ago | 0

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Answered
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 months 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 months ago | 1 answer | 0

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Answered
Find 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 months ago | 0

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Answered
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 months ago | 0

Answered
Filter design to remove noise
Are you talking about the high frequency stuff? Try lowpass.m

3 months ago | 0

Answered
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 months 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 months ago | 1 answer | 0

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answer

Answered
How 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 months 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...

3 months ago | 1 answer | 0

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answer

Question


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 ...

3 months ago | 0 answers | 0

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Answered
How 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...

3 months ago | 0

Answered
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...

3 months ago | 0

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Question


Object Arrays in Code Generation
Does code generation support arrays of custom objects? Here is a simple class. classdef MyClass properties value...

3 months ago | 1 answer | 0

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answer

Answered
Code 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...

3 months ago | 0

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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...

3 months ago | 1 answer | 0

1

answer

Answered
ROS2 Bag Writer?
I appears as though this wasn't supported for R2022a, but the prerelease of R2022b has a new function ros2bagwriter object: http...

3 months ago | 0

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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 months ago | 0 answers | 0

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answers

Question


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 months ago | 1 answer | 0

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Question


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 months ago | 1 answer | 0

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Answered
Compatibility 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 ...

4 months ago | 1

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