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Walter Roberson


Last seen: Today Active since 2011

I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location. I am currently caught up to T0099119; if you are waiting on a reply from me for an older issue, please send me a reminder.

Programming Languages:
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English

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Answered
Textualizing VPA array with compose() seems to be broken?
compose with symbolic parameters is the function composition operation, not an operation for producing text

3 hours ago | 0

Answered
How to Generate Subscripted Arrays in Live Scripts
You cannot get a formatted output of When you have an assignment such as Z_a = sym('z', [1 3]) then the display never form...

17 hours ago | 0

Answered
Raspberry Pi 5 Setup - MATLAB Support Package
In R2021b, https://www.mathworks.com/help/releases/R2021b/supportpkg/raspberrypiio/ug/install-support-for-raspberry-pi-hardware....

4 days ago | 0

Answered
It is showing error tht switch expression must be a scalar or a character vector.
[net_ga, ~] = ga(@(x)train_neural_network(x, inputs, targets, hiddenLayerSize), net.numWeightElements, ga_opts); You cannot pas...

7 days ago | 0

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Answered
Error during contour plot
the first parameter to contourf is the x data, which corresponds to *columns*. the second parameter to contourf is y data which ...

9 days ago | 0

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Answered
How can I run multiple symbolic functions simultaneously
In order to run three symbolic functions simultaneously, you can use a background pool and parfeval() the execution of each of t...

13 days ago | 0

Answered
Fastest way of opening a text file and converting it to a matrix?
If your file happens to be just a rectangular block of numbers, with either blank or comma between them, then the fastest approa...

16 days ago | 0

Answered
Is MATLAB 100% reliable? Do the users need to modify it according to their usage? I need this for my presentation in class. Thank you!
MATLAB has not undergone formal proof of correctness, so it is not 100% reliable. (There are not many mathematical software p...

17 days ago | 0

Answered
How do I delete bytes from the end of a binary file?
Unfortunately MATLAB does not support any truncation operations for files.

18 days ago | 0

Answered
ERROR during opening file in matlab2021b
You need to rename or delete your Documents\MATLAB\length.m file, as it is interfering with calling MATLAB's built-in length fun...

18 days ago | 0

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Answered
I want to download Matlab 2019or 2021 or 2020 for my macOs monterey 12.6
If the dropdown is stuck at R2024a then you are not logged in as a licensed MATLAB user. (Or possibly you are a student user an...

18 days ago | 0

Answered
How can I implement the Matlab code(Not Simulink) to the Parrot Mambo Drone?
You would need to use something like Embedded Coder for this. You will not be able to take advantage of anything in the support ...

22 days ago | 0

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Answered
I have the R2023a Matlab file but the command window script is in R2023b and R2024a so how could I open it in the R2023a version
You do not need to do anything special. .m files are plain text files, and so are fully compatible for opening between release...

22 days ago | 0

Answered
I got Inf when calculating 13959^475, how can I solve this problem?
c=13959; mod(sym(c)^475, 20711) powermod(c, 475, 20711) which powermod powermod() needs the symbolic toolbox

22 days ago | 0

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Answered
I could not display all the legends related to the plotted bars
When y is an array, then one legend entry is created for each column of y When y is a vector, then one legend entry total is cr...

22 days ago | 0

Answered
warning all the time, don't know what is wrong
The 0^n and 0^(m-1) occur because there are not constraints on m and n, so there is the possibility that 0^0 is being generated,...

23 days ago | 0

Answered
Is there a MATLAB's supercomputer the registered user can use to run numerical simulations?
You can use Amazon Web Services, or Azure https://www.mathworks.com/solutions/cloud.html

23 days ago | 1

Answered
How can I simulate an ultrasonic sensor in combination with 4 MEMS microphones
Depending on the exact MEMS device, you will need to connect the MEMS to either an I2C or a digital input pin, of a device such ...

24 days ago | 0

Answered
Failure in initial objective function evaluation. LSQNONLIN cannot continue.
%%%% code for biggest astroid possible %%% This example shows how to do the inverse kinematics for a 2 link manipulator and do ...

24 days ago | 0

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Answered
Plot multiple maps with transparency using raster data
% load the 3-D data load var_slice.mat load lat.mat load lon.mat % plot for K = 1 : size(var_s...

24 days ago | 1

Answered
Error using horzcat Dimensions of arrays being concatenated are not consistent
test = readtable('test.csv'); col_test = [(double(test.u_id(:))), test.score(:)]; %remove 1st entry col_test_update = col_t...

24 days ago | 0

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Answered
Use for loop to assign zeros function to a variable size array
Nz = 200; number = 4; IC = zeros(number, Nz*2);

24 days ago | 0

Answered
How to create a series of separate tiff files?
Your filename includes a colon . colon is not a valid character in a filename for Windows (other than for drive letter) or MacOS...

25 days ago | 0

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Answered
estgeotform2d Not all transformType arguments are available?
You are looking at the R2024a documentation, but you are using R2023b. (That and the fact that the R2024a documentation misses ...

25 days ago | 1

| accepted

Answered
error using importONNXNetwork, importONNXNetwork cannot be called from compiled applications.
The issue is that you are not permitted to call importONNXNetwork in a compiled application. You have to break the code into tw...

25 days ago | 0

| accepted

Answered
Get UI object name
No. You are working with handles, and there are multiple names for the same handle. You can chase the Parent property to get the...

25 days ago | 0

Answered
my code is saying aren't matching on line 130-132
N=A'*A; C=A'*Y; Kh=N/C; N will be 6 x 6. C will be 6 x 1. The / operator requires that the matrices have the sa...

25 days ago | 0

Answered
How to implement new Latex Font in matlab?
There is no way (documented) to add latex fonts to most of MATLAB. There used to be an obscure way it could be done, but that wa...

25 days ago | 0

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