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Michael


Northern Arizona University

Last seen: 2 dagen ago Active since 2013

Programming Languages:
MATLAB

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Question


ROS2 Subscriber Callback Function Arguments for Code Generation
I need to pass additional variables to my ROS2 subscriber callback function. I am trying to follow the help file explicity, whic...

17 dagen ago | 1 answer | 0

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answer

Question


ROS2 Message Received Callback for Code Generation
The Question I'm trying to receive messages on a ROS2 network and exectute a callback function when messages are received. I ne...

19 dagen ago | 1 answer | 0

1

answer

Question


Using coder.ceval to getcwd()
I am trying to get the current working directory in generated C++ code. I think it is possible using coder.ceval() by calling th...

29 dagen ago | 1 answer | 0

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answer

Answered
mean square error (MSE) between two graphs
Interp them so they are on the same grid and then do the regulare MSE calc? xLED_vermelho_K_INTERP = interp1(ss,xLED_vermelho_...

ongeveer een maand ago | 0

Question


Coder RuntimeChecks Error Line Numbers
If I turn on RuntimeChecks in my coder config for C or C++ code generation (cfg.RuntimeChecks = true; codegen my_function -args ...

ongeveer een maand ago | 1 answer | 0

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Question


ros2genmsg Error when updating to R2022b
I was able to generate/use custom ROS2 messages with R2022a, but I just upgraded to 2022b and I am not getting an error when I ...

ongeveer een maand ago | 1 answer | 0

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Question


Coder ROS2 Build Error (colcon) with Custom ROS2 Message
I have a custom ROS2 message that am integrating into a Matlab function that is getting deployed on a remote Linux maching using...

ongeveer een maand ago | 1 answer | 0

1

answer

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...

3 maanden ago | 0

| accepted

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

3 maanden 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> ...

3 maanden 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...

3 maanden 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...

3 maanden ago | 1 answer | 0

1

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...

3 maanden ago | 1

| accepted

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 ...

3 maanden 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...

3 maanden 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...

4 maanden ago | 1 answer | 0

1

answer

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...

5 maanden 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,...

5 maanden 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 ...

5 maanden ago | 1 answer | 0

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answer

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 ...

5 maanden 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...

5 maanden ago | 0

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

5 maanden 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...

5 maanden 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...

5 maanden 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"...

5 maanden 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...

5 maanden 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 ...

6 maanden 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...

6 maanden 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...

6 maanden 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...

6 maanden ago | 1 answer | 0

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