Walter Roberson

Last seen: Today | 自 2011 起处于活动状态

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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
when i try to integrate the function it keeps giving me an error
ao=(int(sym(3),0,0.01)+int(sym(-3),0.01,0.02))

1 day 前 | 0

已回答
Unable to perform assignment
t=5; syms u10 u9 u8 u7 u6 u5 u4 u3 u2 u1; syms x10 x9 x8 x7 x6 x5 x4 x3 x2 x1; syms y10 y9 y8 y7 y6 y5 y4 y3 y2 y1; a12 =...

1 day 前 | 0

| 已接受

已回答
TerminalConfig error for Matlab 2015a
The session interface begins with daq.createSession and sessions do not have a TerminalConfig property https://www.mathworks.co...

1 day 前 | 0

已回答
Add lines of text to CNC programming code
filename_in = '10267.TAP'; [filedir, basename, ext] = fileparts(filename_in); filename_out = fullfile(filedir, basename + "_...

1 day 前 | 0

已回答
Digital Image Corrupted by AWGN
lenna = imread('lenna.pgm'); lenna_bin = reshape(dec2bin(lenna(:), 8).' - '0', 1, [])'; lenna_bin reflects the size of lenna i...

2 days 前 | 0

已回答
Why do i get this error? "Unrecognized function or variable 'prop'."
You are trying to invoke Export_SolidWorks_v18 passing in the single undefined parameter prop . prop is undefined. There is no ...

2 days 前 | 0

| 已接受

已回答
How can I reduce the execution time of my code?
for i = 1:m-1 for j = 0:(i - 1) for k = 1:(2^j + 1)-1 if i == 2^j + k - 1 fprintf('F...

2 days 前 | 0

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

5 days 前 | 0

已回答
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...

6 days 前 | 0

已回答
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....

9 days 前 | 0

已回答
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...

12 days 前 | 0

| 已接受

已回答
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 ...

14 days 前 | 0

| 已接受

已回答
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...

18 days 前 | 0

已回答
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...

21 days 前 | 0

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...

22 days 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.

23 days 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...

23 days 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...

23 days 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 ...

27 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...

27 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

27 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...

27 days 前 | 0

已回答
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,...

28 days 前 | 0

已回答
How to import multiple csv files into a single appropriate data structure for processing and plotting
Use outerjoin

28 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

28 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 ...

29 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 ...

29 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...

29 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...

29 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);

29 days 前 | 0

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