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Walter Roberson


Last seen: Today 自 2011 起处于活动状态

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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已回答
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...

5 hours 前 | 0

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

1 day 前 | 0

已回答
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...

1 day 前 | 0

| 已接受

已回答
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...

1 day 前 | 0

已回答
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 ...

5 days 前 | 0

| 已接受

已回答
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...

5 days 前 | 0

已回答
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

5 days 前 | 0

| 已接受

已回答
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...

5 days 前 | 0

已回答
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

6 days 前 | 1

已回答
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 ...

7 days 前 | 0

已回答
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 ...

7 days 前 | 0

| 已接受

已回答
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...

7 days 前 | 1

已回答
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...

7 days 前 | 0

| 已接受

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

7 days 前 | 0

已回答
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...

8 days 前 | 0

| 已接受

已回答
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 ...

8 days 前 | 1

| 已接受

已回答
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...

8 days 前 | 0

| 已接受

已回答
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...

8 days 前 | 0

已回答
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...

9 days 前 | 0

已回答
"Your license will expire in 12 days" appears. Even though I tried "/matlabcentral/answers/100222-why-do-i-receive-a-message-that-matlab-will-expire-in", the same appears
There is nothing you can do about this. The prerelease is going away soon. The official R2024a release will be pretty soon -- p...

9 days 前 | 0

已回答
Help with making parfor loop work
First of all, you are permitted only one assignment into a variable indexed by your parfor loop. Having symTable(ii,1) = {curre...

9 days 前 | 0

已回答
Is there a way to terminate integration when multiple events are triggered simultaneoulsy?
Adjust the isTerminal flag as all(TheExpressions < 0) or as appropriate.

9 days 前 | 0

| 已接受

已回答
Help (f1) opens an empty window (R2023b)
It is probably worth experimenting with configuring the documentation to be stored locally. Preferences -> Help -> MATLAB Help ...

9 days 前 | 1

| 已接受

已回答
Error using fittype for model evaluation
You cannot use nonscalar coefficients in the fit model. Your Fe2_plus and so on are nonscalar. The computing model is that the ...

9 days 前 | 0

已回答
Error (Unable to perform assignment because value of type 'sym' is not convertible to 'double'.)
PcT = zeros(length(thresh)); PcT is assigned as numeric zeros. F1 = int( PL(w)*f(w) * (1/(1+ U(T) * PA * B(i) * w^(-...

11 days 前 | 0

已回答
Convert series of analytical solutions to matrix vector format
syms x I E0 B l C3 C4 C5 F kt V1 = int(1/2 * I * E0 * (1 + (B-1) * x/l) * (2*C3 + 6*C4*x + 12*C5*x^2)^2, x, 0, l); V2 = int(...

11 days 前 | 0

| 已接受

已回答
Error using symengine Unable to convert expression containing symbolic variables into double array. Apply 'subs' function first to substitute values for
axes clear clc close all format short g ndofn = 3; % number of degrees of freedom per node % each number corresponds to a ...

11 days 前 | 1

| 已接受

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