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Walter Roberson


Last seen: Today 2011 以来アクティブ

I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location.

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Unrecognized function or variable 'GEPP'.
function [Gi, Ol, To, Ef]= GEPP (Candidates, Nc, Beta ,PGmax ,PGmin, X, Btype, Nl, Nr, Smax, Length, Biu, Ga , Pg, Pl, Ybus); I...

約3時間 前 | 0

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How to plot delta of dirac from fourier transform result in Matlab GUI
When you talk about the result of the fourier transform being in terms of dirac(), that tells me you are using symbolic fourier ...

約3時間 前 | 0

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Amplitude of signal not matching up after filtering when calculating it using different methods.
Every separate filter() call initializes the filter state to zeroes before processing the figure. Every window that you process ...

約3時間 前 | 1

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How to test if there is a leap year between 2 years?
Take the range y to x, and use vectorized processing to test whether each of the values is a multiple of 4 and not a multiple of...

約4時間 前 | 0

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How can I pick only first solution of equation
S(1) You should also be considering roots([p1, p2, p3, p4, p5])

約5時間 前 | 0

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addpath problem when building a standalone exe
https://www.mathworks.com/help/compiler/unsupported-functions.html Functions Not Supported for Compilation by MATLAB ...

約18時間 前 | 0

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Error_Unable to perform assignment because brace indexing is not supported for variables of this type
Repaired code, no loop. i = size(platemap,1); [S{i,1}, G{i,1}] = cellcyclestages('f',Data{i,1},params,opts); You do not need ...

約19時間 前 | 0

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I cannot understand why I'm getting the error in this code
endfor and endfunction are not part of the MATLAB language. I believe they are part of a different programming language named oc...

約19時間 前 | 1

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I am struggling to get this code to work.
You might be interested in using montage(). The output of montage() is an image() object that you can get the CData for, and the...

約20時間 前 | 0

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Write matlab program to plot discrete-time sinusoid x[n]=cos(πn/12+π/4)
Hints: https://www.mathworks.com/help/matlab/ref/pi.html https://www.mathworks.com/help/matlab/ref/double.cos.html https://...

約22時間 前 | 0

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How can I convert multiple .cti files to .txt files
See https://www.mathworks.com/matlabcentral/answers/161468-reading-undelimited-comma-numbers#answer_157856 for some code that co...

約22時間 前 | 0

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Integral3 is taking forever to finish computing integral
The nested integral (6 total levels) just takes a long time to compute.

約22時間 前 | 0

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finding multiple datetime cells from a table
Convert to timetable and use a timerange() https://www.mathworks.com/help/matlab/ref/timerange.html The end date would be the ...

約24時間 前 | 0

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how to find integral
First let us enter the equation in without losing precision S = '74513/(10000*sign(0.99966444607707671821117401123047*e + 15567...

1日 前 | 0

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Function that creates figures only?
No, it is not possible in MATLAB to create a function that *only* produces plots without doing *anything* else. In the case w...

1日 前 | 0

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Imread error in Raspberry pi deployment
Two cases: If the file is a static file available to the matlab host, with constant name, then read the image and save it to a ...

1日 前 | 0

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Can someone explain why I am getting the error "Not enough input arguments (line 4)"?
You tried to run the function without passing any matrix to it, and matlab complained that it could not find any input being pas...

1日 前 | 0

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There is an error in line 3. I can't figure out what the error is. Please help me find out.
You tried to run the function without passing any matrix to it, and matlab complained that it could not find any input being pas...

1日 前 | 0

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Matlab integral funtion error
f=@(x)(x.*exp((x.^2)-1))./sin(x)

1日 前 | 1

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How to elegantly open or create new file for reading and writing but not discard existing contents?
fopen with 'a' and close immediately. Then fopen 'r+' This does rely on no process deleting the file between the time it is ...

1日 前 | 0

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How to define an objective function that maximize one thing and minimize the other at the same time?
Any matrix that does not have full rank will have a determinant of 0. If there is a k in range that makes X have rank less than ...

1日 前 | 1

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converting index to coordinates(row,col) is giving me error
[row,col]=ind2sub(sz,12744)

1日 前 | 1

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How to maximize determinant of a matrix?
CostFunction = @(x) -det(x); % Cost Function

1日 前 | 1

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how to use .mex file in simulation for quanser qube servo?
There is no possibility that will work. MEX files require a full MATLAB runtime, either as an actual MATLAB or as the MCR (MATLA...

1日 前 | 0

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random select n elements from n arrays
Lists = arrayfun(@(idx) randi(99,1,100), 1:50, 'uniform', 0); one_random_selection = cellfun(@(L) L(randi(100)), Lists) sort...

1日 前 | 0

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Write image info using imwrite or other method
You cannot do that using imwrite(). Most of what you want to write is EXIF information. MATLAB does not support writing EXIF i...

1日 前 | 1

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How to store nonlcon value at solution using fmincon?
fmincon() is permitted to evaluate at locations without passing that exact location through the nonlinear constraints before or ...

2日 前 | 0

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Tips for organizing variables in the workspace? Is there an option like "exlude capitalized variables" like python/spyder?
The below code, when executed, creates a list of links, one for each lower-case variable name. When clicked, the variable will b...

2日 前 | 1

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Is it possible to write an 'empty' cell in Matlab, not NaN?
In the below code, I examine the first numeric line, and I assume that if the second element is nan, that the first element is i...

2日 前 | 0

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integrating a function using int
Use the techniques I show at https://www.mathworks.com/matlabcentral/answers/890822-how-can-i-integrate-a-function-which-has-thr...

2日 前 | 0

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