Answered
Simpson method, ezplot (with strings)
Calculate dt first. Then calculate Q.*c.*dt. Now use https://www.mathworks.com/matlabcentral/fileexchange/25754-simpson-s-rule-f...

1 year ago | 0

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question about dely lines
you cannot implement those equations. e(n) is defined in terms of d(n) d(n) is defined in terms of e(n - something) Sub...

1 year ago | 1

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Matlab to solve finite difference for Ode
S = 'aa = 1; bb = 2; alpha = 1; beta = 2; n=29; % h = (bb-aa)/(n+1); h=0.1' idx = find(S>128) S(idx) S(idx)+0 Your co...

1 year ago | 0

Answered
Event triggered control using ode45
Proceed as described in https://www.mathworks.com/matlabcentral/answers/2169908-while-in-ode45#answer_1552013 %assuming r_k is...

1 year ago | 0

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Answered
Change Stacking Order of Plots
pdeplot(results.Mesh, XYData=results.NodalSolution, ZData=results.NodalSolution, ColorMap="jet"); view(2) Those lines imply th...

1 year ago | 0

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Answered
hi, it says "Unable to perform assignment because the size of the left side is 1-by-3 and the size of the right side is 1-by-2" and the error is at line 96 in my code
Node(1,:) = [0,0]; Node(2,:) = [3,3]; Node(3,:) = [6,6]; Node(4,:) = [9,9]; Node(5,:) = [18,0]; Node(6,:) = [9,0]; That cr...

1 year ago | 0

Answered
control random number generator in async programming
parpool are defined to seed random number generators differently. See https://www.mathworks.com/help/parallel-computing/control-...

1 year ago | 1

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How to get 1 as the highest order coefficient in a polynomial expression?
syms p K_s0 Phi_V Phi_G s K_p K_x0 T_i real; Phi_V = -p*(K_p/K_x0)*(1 + 1/(s*T_i))*1/s; eqn1 = p == K_s0*(Phi_V + Phi_G); eqn...

1 year ago | 0

Answered
The line on the legend are not showing
What you describe sounds as if either X_1 or Y_1 are scalars. In such a case, requesting . or o will draw markers, but there wou...

1 year ago | 0

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Answered
Plotting z = f(x, y) when (x, y, z) values are known
Use https://www.mathworks.com/help/pde/ug/decsg.html to create a decomposed geometry. Calculate the temperature values on the r...

1 year ago | 0

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Answered
why do I get a negative numbers???
opts = optimoptions('fsolve', 'MaxFunctionEvaluations', 1e6, 'MaxIterations', 1e6); Guess = linspace(0,.001, 23); Answers = fs...

1 year ago | 0

Answered
TI Radar Toolbox with DCA1000EVM Connection - Continuous error occurs when attempting to connect with an Ethernet cable
Your ipconfig shows that you have configured the local IP address of the second interface as 192.168.33.30 . However, 192.168.33...

1 year ago | 0

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how to extract only digits from an image
Use ocr passing the option 'CharacterSet', with value '0123456789'

1 year ago | 0

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How do I extract data from a structure using a for loop?
fieldnames = fieldnames(YourDataStructure); num_fields = length(fieldnames); last_field_values = cell(num_fields,1); for FI...

1 year ago | 0

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is there a way for a creation of variables for machine learning inside a loop from a dataset of waves
data_names = who('-file', 'sub-036_task-eyesclosed_eeg.set', '-regexp', '^data_\d+$'); for DNI = 1:length(data_names) this...

1 year ago | 0

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I have an error using walsh. It says
walsh() is not the name of any Mathworks supplied function. walsh() is the name of one File Exchange contribution, https://www....

1 year ago | 0

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Matlab GA parallel computing
fid = fopen('Design_Variables.inp', 'w+'); % Ansys APDL reads this %... ansys_input = 'ANSYS_APDL.dat'; output_file = 'out_fi...

1 year ago | 0

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Answered
Solving ODE with explicit equations
if and(t >= 0.05, t < 1.5) k = 0.05; elseif and(t < 0.05, t >= 1.5) k = 0; end Ug = n + k * V1; That code only def...

1 year ago | 1

Answered
Fitting and predicting from 3D data
idx = find(Output(Var1,:,:) == OutputValue); [~, var2, var3] = idx2sub(size(Output), idx); Except that comparing using == is n...

1 year ago | 0

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Getting the evaluation progress of the gather command
You need to turn diary on, and access the diary file while it is still being written. As you will need code to do that, and the ...

1 year ago | 0

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Answered
syntax of this line tmp = cellfun(@(tbl) tbl(:, cellstr(dataVariables(ct))), trainDataNormalized, 'UniformOutput', false);% in RUL tutorial
@(tbl) tbl(:, cellstr(dataVariables(ct))) That syntax outputs the handle of an anonymous function. The anonymous function acce...

1 year ago | 0

Answered
An error occurred while running the simulation and the simulation was terminated
You have a MATLAB Function block in the lower left. It has s0 as input and ds0 as output. The 4th line of code for it is ds0=(s...

1 year ago | 0

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How can I run a system-level simulation with 802.11be, in which I can use MRU?
https://www.mathworks.com/help/wlan/gs/802-11-standards-supported-by-wlan-toolbox-for-phy-modeling.html 802.11be™ support is cu...

1 year ago | 0

Answered
How to modify the mesh generated from meshgrid to create a rectangular void in the middle of the mesh
You might be better off taking a different approach. You might be better off decomposing a geometry If you follow the steps fro...

1 year ago | 0

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Big Tiff Grayscale image looks unsharp/ Grayvalue is not shown properly
When imshow is asked to display an image that is larger than the figure size, it displays a downscale version of the image. The ...

1 year ago | 0

Answered
Import 2d image to 3d plot
The major problem with mixing 3d plots with images, is that image() is a strictly 2D object -- images disappear quickly when til...

1 year ago | 0

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Answered
Concerned that matlabFunction( ), when converting from symbolic to numerical, changes the sizes of matrices and vectors,
The expression is creating a 1 x 9 vector and reshape() it to 3 x 3. It may be a bit clumsy compared to directly generating a 3 ...

1 year ago | 1

Answered
Keep trailing zeros in an output file.
You cannot do that using writematrix() You can use dlmwrite with a 'precision' option. However, there is no option to adjust th...

1 year ago | 0

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Answered
Why does Matlab tell me that my ODE function returns a vector of length 12, while the length of my initial conditions vector is 6?
It is common for this to happen if you accidentally forget to index the variable, For example, dydt = [z(1).^2; z(2)-z...

1 year ago | 0

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Answered
Different color scale?
caxis([0 0.3]); That is affecting the current axis. caxis([0 0.5]); That too is affecting the current axis. Which app...

1 year ago | 0