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error on line 42 : gui_mainfcn(gui_State, varargin{:});
Change delete(instrfind({'Port'},{'COM3'})) clear a; global a; a = arduino(); to global a; if ~isempty(a); clear global a...

3 years ago | 0

Answered
Code not showing any result or any error
Your code defines kepler_plot but never invokes it. But you have other problems as well. I had to guess what you were doing. e...

3 years ago | 0

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Requesting a demo code for calculating second-order statistics (contrast, correlation, energy, homogeneity, and entropy) for medical images.
Split the code up into two parts: read the medical images into memory arrays code that calculates second-order statistics on m...

3 years ago | 0

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Concatenating matrices unable to create a row jump
cruzzi = []; Numeric array. cruzzi{i} = [cruzzi imbinarize(tigger{i,o}, carrey)]; First cycle, cruzzi is the empty nu...

3 years ago | 0

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Parameter tunning using GA
You cannot fix that. You are calculating four costs each time, but ga() can only handle one cost at a time. ga() will never be a...

3 years ago | 0

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Answered
how to solve this, Error using .* Arrays have incompatible sizes for this operation. Error in Elm (line 156) tempH_test=InputWeight.*TV.P;
The .* (element-by-element multiplication) operator can proceed in the case where: every dimension that is not 1 in either Inpu...

3 years ago | 0

Answered
How to use subroutines inside subroutins in GUI functions?
A different one of your questions implies that you are using GUIDE, or hand-building your code -- that in particular you are not...

3 years ago | 0

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Is it possible to pass a variable throu a callback function?
Yes. In general see http://www.mathworks.com/help/matlab/math/parameterizing-functions.html However, in the special case of set...

3 years ago | 1

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Answered
How to write a subfunction inside a GUI function?
Yes, it is possible. In the case of App Designer you might have to define the function in a separate .m file if it is not a cal...

3 years ago | 0

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How to create a protected file
Not really. You can embed a SoC kind of computer within a tamper-resistant covering that would be likely to break with all of...

3 years ago | 0

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Answered
Universal Time to Local Time conversion
If LT is datetime() then you need to adjust the Format property of LT I recently encountered someone who was doing a similar ...

3 years ago | 0

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Answered
Process .dat file, plot, scale, and put back into similar format
Your code says to scan the file for 8 floating point numbers with commas between them with a delimiter of tab. But your file con...

3 years ago | 0

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this code was sabotaged please correct it
The missing code for unified_friction_pipe is on page 100 of Managed Pressure Cementing Simulations of Pressure and Flow Dyna...

3 years ago | 0

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怎么用matab找到对某个概率密度函数从0开始积分对应积分结果为0.5的积分上限，
format long g f = @(x) exp(x).^2 - sin(x); %example function x0 = 0.8; UB = fsolve(@(ub) integral(f, 0, ub) - 0.5, x0) ...

3 years ago | 0

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Answered
Index exceeds array dimensions. Index value 9 exceeds valid range [1-1] for array 'm2'.
m2((l1^2) MATLAB has no implied multiplication. That is a request to index m2

3 years ago | 1

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Error in data size using CIC filter in Simulink R2020b: The number of input rows must be a multiple of the decimation factor
You appear to be passing a 1 x 1 signal into decimation. Decimation works on a non-scalar. You probably need to buffer the sig...

3 years ago | 0

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How can I get the right image ratio when displaying an image behind a graph?
The rule is that the XData you provide will be used as the center of the pixels. You want to shift the boundaries by half of a p...

3 years ago | 0

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I am coding a kinetic equation by using ode dsolve but i got: Warning: Unable to find symbolic solution.
Your O3 is a function of t. You have O3^m where m is an unknown. You are not going to find a solver that is able to deal with ...

3 years ago | 0

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I have a problem with the angle function
Your angle(Ew) oscillates around 0 so quickly that unwrap() ends up just adding more and more full cycles to try to keep up. Eve...

3 years ago | 1

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How can I load a field from a struct that is stored within a .mat file?
In the case that the .mat file was saved with -v7.3 then see https://www.mathworks.com/help/matlab/import_export/load-parts-of-v...

3 years ago | 2

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Answered
three order complex coefficient polynomial root matlab
syms x A B C eqn = 28*x^3 + A*x^2 + B*x - C == 0; solutions = solve(eqn, x, 'MaxDegree', 3) char(solutions(1)) char(solution...

3 years ago | 1

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How to solve the problem of finding several similar names?
pat = digitboundary + filename + digitboundary; [row,column]=find(contains(filenamenew, pat)); This constrains the search to c...

3 years ago | 1

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Answered
why do Simulink signals end up with different lengths after simulation?
Generally speaking, conditional execution can result in signals being inactive during all or part of the execution; those are no...

3 years ago | 0

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Answered
How to use parallel.pool.Constant to save on overheard for large array constant across all calls to parfeval?
Version history R2023a: Constant objects no longer automatically transferred to workers MATLAB will no longer automati...

3 years ago | 0

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Reloading handle objects from .mat files
f1 = figure(1); ax1 = axes('Parent', f1); h1 = plot(ax1, 1:10); save tst f1 h1.YData(end) = 5 datastruct = load('tst'); ...

3 years ago | 2

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When I run my code, I keep getting this error: "Undefined function or variable 'y'."
Later you keep referring to sol.y so perhaps the reference to y should instead be to sol.y

3 years ago | 1

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Answered
I have xyz data from which i want to formulate an equation
No, it can be shown mathematically (and I have posted proofs before) that given any finite set of finitely-represented points, t...

3 years ago | 0

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What am I doing wrong here? I Keep getting "All table variables must have the same number of rows." error.
methodNames = {'GLLS', 'fminsearch'}; That is a row vector of length 2 standardErrors = [S_t_eq1_glls, S_t_eq1_fmin, S_t_eq2_g...

3 years ago | 1

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Answered
Linearization using the power function
x = 0:0.2:1.8; y = [1.3 2.1 3.0 5.2 8.4 13.5 22 33.5 53 85.4]; x starts with zero xx = log10(x); log10(0) is You cannot ...

3 years ago | 0

Answered
How can I create an updating variable for a user input foler name?
scan_loc = 800; binsize = 50; filenums = [2, 7, 11:13]; %eg. you want Adam2, Adam7, Adam11, Adam12, Adam13 numfiles = le...

3 years ago | 0