Walter Roberson - MATLAB Central
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Walter Roberson


Last seen: Today |  Con actividad desde 2011

Followers: 60   Following: 0

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I am currently in the middle of moving, so I am not around very much.

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

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Respondida
Shapley based feature selection
YtestPred = predit(Mdl, Xtest); test_accuracy = nnz(Ytest(:) == YtestPred(:)) / numel(Ytest) * 100; fprintf('test accuracy: %....

alrededor de 12 horas hace | 0

Respondida
Why do I get conj(L)
You probably used the ' operator on the symbolic vector. For example, syms L [1 4] A = [2 3; 4 5]/7 B = [L1 L2; L3 L4] C = A...

alrededor de 15 horas hace | 1

Respondida
How can I create a singleton object that is processed in parallel threads and processes?
How can I create a singleton-object that is processed in parallel threads and processes? That is not possible with process thre...

alrededor de 18 horas hace | 0

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Respondida
Error using trainNetwork Invalid training data. For classification tasks, responses must be a vector of categorical responses. For regression tasks, responses must be a vector
For regression tasks, responses must be a vector, a matrix, or a 4-D array of numeric responses which must not contain NaNs. Y ...

1 día hace | 0

Respondida
Comprei um novo pc e preciso transferir a licença do antigo para esse
The MATLAB license does not permit the Student version to be installed on more than one host. dbtype(fullfile(matlabroot, 'lice...

3 días hace | 0

Respondida
Need offline installer for MATLAB version R2023a.
See https://www.mathworks.com/help/install/ug/install-using-a-file-installation-key.html Alternately, use https://www.mathwork...

3 días hace | 0

Respondida
How to write aa code to find factors of numbers in a set of numbers?
First of all, call factors() on the number. Run through the factors, building a list of each unique factor and its number of rep...

3 días hace | 0

Respondida
Animation of a volume
You could use the File Exchange contribution videofig https://www.mathworks.com/matlabcentral/fileexchange/29544-figure-to-play-...

4 días hace | 0

Respondida
Why do I write as Ib(1:478,31:565)(~BW) = 255
temp = Ib(1:478,31:565,:); temp(~repmat(BW,1,1,ndims(temp))) = 255; Ib(1:478,31:565,:) = temp;

4 días hace | 0

Respondida
how we get matlab pass key
If you purchased MATLAB, then the license key should have been emailed to you. If you did not receive it, then contact support@m...

4 días hace | 0

Respondida
WHY ITS TAKING TIME TO LAUNCH MATLAB EXE FILE IN VISUAL STUDIO C++?
The official solution is to use MATLAB Production Server https://www.mathworks.com/products/matlab-production-server.html Produ...

4 días hace | 0

Respondida
how to provide feedback to MathWorks about an issue in Matlab
https://supportcases.mathworks.com/mwsupport/s/casetypeselection?language=en_US&c__caseParameter=productusage&s_tid=srlp_product...

4 días hace | 1

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Respondida
What plugins to be installed for MATLAB
https://neuro-jena.github.io/cat/ Requirements CAT12 is designed to work with SPM12 and Matlab versions 7.4 (R2007a) ...

4 días hace | 0

Respondida
Can I convert shades of red (Pink, Red, Maroon) in this RGB image to one single color, lets say blue?
im = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/171158/image.jpeg'); imshow(im) HSV = rgb2hsv(im...

4 días hace | 0

Respondida
run the below code and get output
Run ModelSimulation from https://github.com/vagg777/5G-Network-Simulator-for-User-Distribution# . It sets up all of the variable...

4 días hace | 0

Respondida
can a matlab license be used on many systems
To do that, you would need one of: Concurrent license sized for 2 concurrent licenses Standard/Commecial/Professional individu...

4 días hace | 0

Respondida
Why am I receiving a "Trial Not Available" error when generating a Trial License?
One of the main reasons why trials might be automatically denied, is if you are located in a country that is served by a distrib...

4 días hace | 0

Respondida
How do I convert symbolic values from a matrix to numeric?
n = 5; syms v [n,1] v v(1) So indexing v does work to return the corresponding symbolic variable. Meanwhile, to substitute ...

4 días hace | 0

Respondida
How can i store looped data from sensor in a table?
Initialize T = table('Size', [0 4], 'VariableTypes', repmat({'double'},1,4), 'VariableNames', {'interval', 'temp', 'pressure',...

5 días hace | 1

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Respondida
How can I get splines subject to constraints?
You are trying to get vpasolve() to invent functions that satisfy certain purposes, trying various forms of f until it satisfies...

5 días hace | 1

Respondida
Importing Point cloud to overlay on solid object
You probably need to use scatteredInterpolant . In some cases the scattered data is an "unraveled" rectangular grid; in such cas...

5 días hace | 0

Respondida
How to get variable data depending on the value from another column. In an Array
corresponding_values = Array(ismember(M, Array(:,1), 2)); However, the comparison between M and Array(:,1) that will be done is...

5 días hace | 1

Respondida
Question solve(eqn)
syms a0 a1 a2 a3 a4 a5 v = [0 2 4 6 8 10] f = [0 2.9 14.8 39.6 74.3 119] f1 = a0 + a1*v(1) + a2*v(1)^2 + a3*v(1)^3 + a4*v(1...

6 días hace | 0

Respondida
How to get 'Live Editor Evaluation Helper' .m file name from live script through another live script?
When sub.mlx is called through main.mlx though, the same Live Editor file name is returned twice, which is obviously incorrect. ...

6 días hace | 0

Respondida
find the minimum of polynomial.
syms a b c R f = a*R^2+b*R+c critical_points = solve(diff(f, R), R) value_at_critical_points = subs(f, R, critical_points)

6 días hace | 0

Respondida
can anybody help me to find what is wrong in the following code?
The fzero() function requires a function handle. For symbolic work use vpasolve() syms p f=2-ellipticK(p) x0=0.1 a = vpasolv...

6 días hace | 0

| aceptada

Respondida
ubuntu에 Matlab 설치가 안되요.
It seems to be a problem with Ubuntu 14 https://askubuntu.com/questions/366556/13-10-xrdp-problem-with-gnome-fallback

6 días hace | 1

Respondida
When running imagesc, how can I extend the image coverage on my graph?
imagesc(station2.TemperatureITS90DegC,station2.DepthsaltWaterMLat,station2.TemperatureITS90DegC) When you call imagesc() like t...

7 días hace | 0

| aceptada

Respondida
How do I make this bisection function recognize a bounce on a graph?
Suppose you have something like syms x f = x^3 - 2 * x + 5; tiledlayout nexttile fplot(f, [-5 5]) nexttile fplot(f, [-2 3...

7 días hace | 0

Respondida
how to Specify the arguments of imfilter in codegen function ? how to call it with the right parameters ?
To call C code from inside MATLAB, you use loadlibrary followed by calllib

7 días hace | 0

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