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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
Arduino using matlab GUI, The current sensor gives a value without connecting anything.
That is expected for any input line that is not pulled high or pulled low.

38 minutes ago | 0

Answered
Writing fitness function in multi objective GA
mobj = @(x) [fun1(x); fun2(x) ]

environ 5 heures ago | 0

Answered
i can't save my plot as a png
You are cd to a directory that you do not have write access to. In particular you might be cd to the matlab installation directo...

environ 6 heures ago | 0

| accepted

Answered
Getting - Matrix dimensions must agree, using surf
When you call surf(X, Y, Z) in your very old release, the number rows in Z must match the number of rows in Y and the number of ...

environ 6 heures ago | 0

Answered
Hello, our collaborator has installed Matlab Runtime v9.7, why he gets the error "Matlab.exe not found" ?
MATLAB Component Runtime is *only* used to execute programs compiled with MATLAB R2019b (and no other versions) . It is *not* MA...

environ 7 heures ago | 0

Answered
How can I change voxel size in a volume?
In order to keep the aspect ratio, all dimensions must be interpolated by the same factor, which would be max() of the requested...

environ 8 heures ago | 0

Answered
Why do I receive 'not enough input arguments' in ode45
G=matlabFunction(subs(G,svars,vars),'Vars', {[q q_d]} ); C=matlabFunction(subs(C,svars,vars),'Vars', {[q q_d]} ); W=matlabFu...

environ 12 heures ago | 0

Answered
Check for missing argument or incorrect argument data type in call to function 'int'.
P = inf(size(f)); P(f==0) = 0; You are integrating a vector of non-negative real constants from 0 to infinity. The integ...

environ 14 heures ago | 0

Answered
Error using sym/subs>normalize (line 226) Inconsistency between sizes of second and third arguments.
Jg = subs(J, {lambda theta}, xout); %Jacobian When you use {} around the list of values to replace, then the third parame...

environ 14 heures ago | 0

Answered
How to remove an unwanted file in dataset for example : ".DS_Store"
Specify the file extensions to import. That file will not match the extensions. Also if you use a wildcard to specify the fil...

environ 14 heures ago | 0

Answered
explanation of the matlab code
Equivalent code: rentedforVector(count, 1:9) = decision == (0:8); With no for loop. If decision is 0 then the first c...

environ 14 heures ago | 0

Answered
Create legend based on a if loop statement
you are doing a separate scatter3 for each point. Each of those will result in a new plot object. Your legend call with three la...

environ 15 heures ago | 1

| accepted

Answered
Dynamically Creating Variable Alternatives
parfor sliceno=1:size(Data, 3) slice = Data(:, :, sliceno); change slice Data(:, :, sliceno) = slice; end

1 jour ago | 1

| accepted

Answered
Not enough input arguments
You have a function named movie_kernel that expects to be passed one or more parameters, including a parameter it refers to as X...

1 jour ago | 0

| accepted

Answered
Ode23 error using odearguments
I0=subs ( I0 , ' 3.14 ' , pi ) ; After that add IO = double(IO);

1 jour ago | 1

| accepted

Answered
Is it possible to have an .exe file which works as a function with inputs and outputs inside MATLAB environment, like a c++ .exe or a MATLAB app?
You could use .Net System.Diagnostics.Process to start a process and do i/o redirection of input and output. Most commonly somet...

1 jour ago | 0

Answered
How to plot digital sequence in MATLAB
If you are certain that all of your values are finite, then you can replace u[n] by (n>=0) If you have negative infinite valu...

1 jour ago | 0

Answered
How do I find the nature of turning points using this function?
values that are exactly the same are derivative 0. Once you find a value not equal to the first value, then any string of increa...

1 jour ago | 0

Answered
How to perform the following commands?
temp = abs(result1(1,:)); temp(temp==0) = nan; [~, idx] = min(temp) ;

1 jour ago | 0

| accepted

Answered
Voltage dips on matlab
square() is -1 to +1. you multiply by 0.7 and add 0.3 so you get a range of -0.4 to +1. You multiply your signal by that, but ...

1 jour ago | 0

Answered
Run Matlab code in
https://www.mathworks.com/help/supportpkg/raspberrypiio/run-on-hardware.html

1 jour ago | 0

Answered
fit scatter plot to a curve
x = [0,0.1, 0.2, 0.3, 0.4, 0.46, 0.55, 0.6]; y =[0, 0.0982, 0.1359, 0.126, 0.0778, 0.0827, 0.063, 0.0599]; f= polyfit(x,y,7)...

1 jour ago | 0

| accepted

Answered
help im getting this error
zerocross(F, ukuran, sigma) at the time you invoked zerocross with that line, you had not defined ukuran. Possibly you had ...

1 jour ago | 0

Answered
Understand a part of code Detection CFAR
switch upper(technical) case 'AC' is like if isequal(upper(technical), 'AC') and the next case would be "else...

1 jour ago | 0

Answered
How to extract data from another aplication ?
Unless the app provides a better solution, you will need to ask to capture the screen in that area, and then do Optical Characte...

1 jour ago | 0

Answered
How can I loop for Exponential Decay?
c=c_0*exp(-k(3)*t); if t increases by 1 then the next value is exp(-k(3)) times the previous one. So in loop form, for each...

1 jour ago | 0

Answered
how to store pixel location and color from impixelinfo
What you describe is more Data Cursor http://matlab.izmiran.ru/help/techdoc/creating_plots/data_ex7.html impixelinfo is more...

1 jour ago | 0

Answered
Is there is any alternative for evalclusters (Evaluate clustering solutions)
Yes, for kmeans, the optimal number of clusters is always size(unique(Data, 'rows'), 1) That is, the optimal number of c...

1 jour ago | 0

Answered
How to do the computation using fuzzy logic
The output shown is incorrect. The cup symbol means set union and the upside down cup means set intersection. Almost all of thos...

1 jour ago | 0

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