Answered
How do I find second order implicit differentiation (d2y/dx2) of a function in MATLAB
syms x y DY DF y(x) F=x^2+y^2==1; dy=diff(y); dx=diff(F,x); DF=subs(dx,dy,DY); dydx1=solve(DF,DY); dydx=simplify(dydx1) t...

10 months ago | 1

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Answered
how to save the debugging state at matlab?
Generally speaking, it is not possible to save the full debugging state. Generally speaking, the current state of variables mig...

10 months ago | 0

Answered
I want to remove noise from my audio signal by simplest method?
Suppose you have an input signal that starts with 0.1 and 0.2. Suppose you add noise to the third sample onwards, and after addi...

10 months ago | 0

Answered
Need help debugging given matlab code for school assignment. Recieving weird error need help moving past
b = load('blade.txt'); %Blade specification is modified NREL 5 MW b will generally be a matrix r = b(:,1); %Node radial positi...

10 months ago | 0

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Help fixing fopen error in code
filename = fullfile(files(cntfiles).folder, files(cntfiles).name); [fin, msg] = fopen( filename ); if fin < 0 erro...

10 months ago | 1

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Answered
If I replace old version (R14) running on a 20 y.o laptop with Windows 7 with all new laptop, newest Windows and latest Matlab version, will my old toolboxes still be useable?
R14 was long enough ago that Mathworks would not permit you to pay retroactive Software Maintenance Service to bring your licens...

10 months ago | 0

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Question

MATLAB Answers is currently broken
MATLAB Answers is currently undergoing an unspecified down-time. Mathworks knows about the problems and is working on solving i...

10 months ago | 0 answers | 6

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answers

Answered
Can you help us debug and fix this code entirely?
You can get nearspeech.mat and farspeech.mat as part of the example openExample('audio/AcousticEchoCancellationAecExample')

10 months ago | 0

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Is vectorization worth the trouble with recent MATLAB?
Let us take an example: finding the row indices of the first non-zero row in a 2D matrix. A = full(sprand(10000,500,0.1)); Loo...

10 months ago | 1

Answered
Creating a License manager for a MATLAB app
Mathworks does not provide any particular interface to license managers of any sort. It just provides methods to call external f...

10 months ago | 0

Answered
Filtering column 2 and keeping column 1
mask = filteredData >= THRESHHOLD; selected_time = rawData(mask,1); selected_filtered_data = filteredData(mask); However, i...

10 months ago | 0

Answered
Chase plot changes figure size internally
frame2 = getframe(ax2); writeVideo(vidObj2, frame2); You are fetching graphics data from an axes. It turns out, howeve...

10 months ago | 0

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Answered
The problem is that when I use vpa(U(x,t), 7) to get the solution with 7-digit decimal precision, MATLAB still outputs a very long and complicated expression. how do I fix it?
Observe: a1 = vpa(sym(pi), 7) a2 = vpa(a1, 10) a3 = vpa(a2, 15) a4 = a3 - pi double(a4) From this we deduce that vpa() co...

10 months ago | 0

Answered
How to avoid scientific notation in stackedplot?
h = stackedplot(....); oldstate = warning('off','MATLAB:structOnObject'); hstruct = struct(h); warning(oldstate); arrayfun(@...

10 months ago | 0

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Adding a circle in a 3D surface plot, viewed in 2D
If you are using fplot() then you need to ensure that some of your Z values are below 0 in the region you are drawing the circle...

10 months ago | 0

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Answered
fixed color scale with volshow
After you getframe(fig) use rescale() specifying "InputMin" and "InputMax"

10 months ago | 0

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Aquiring images from mobile camera is too slow
Possibly. You might be able to use the IP Camera support Android: https://www.mathworks.com/help/matlab/supportpkg/acquire-imag...

10 months ago | 0

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mcap file to mat file
https://www.mathworks.com/matlabcentral/answers/1941419-when-do-i-expect-to-get-support-for-mcap-rosbag-files#answer_1522840 @...

10 months ago | 0

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Scripts compiled with mex not accessible from parpool declared as "Threads" instead of "Processes"
https://www.mathworks.com/help/matlab/matlab_prog/run-functions-on-threads.html#mw_1cce412a-b5cb-42a4-b0b3-335654833576 Check ...

10 months ago | 0

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Answered
Unrecognized function or variable 'scope'. error in matlab script
The model probably has "single simulation output" configured for it; https://www.mathworks.com/help/simulink/slref/simulink.simu...

10 months ago | 1

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Answered
Initial convergence mixed integer ga optimization - only unfeasible results?
If the member is infeasible, the penalty function is the maximum fitness function among feasible members of the population, plus...

10 months ago | 0

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Answered
I am trying to incorporate multiple IF statements in my ODE to generate a single output.
The mathematics of ode45 and similar routines is such that the second derivative of the input expressions must be continuous ove...

10 months ago | 2

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How to specify intervals of increasing, decreasing of a function in MATLAB
Start at the left end of the interval. Record sign() of dy there, along with the current position. Move right one position. Calc...

10 months ago | 1

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Answered
How to get mod symbol
title('$||\nabla||$', 'interpreter', 'latex')

10 months ago | 0

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Answered
I want to make that makes graph move with a direction keyboard.
The easiest way is to have a figure, and attach a KeyPressFcn property to the figure; https://www.mathworks.com/help/matlab/ref...

10 months ago | 1

Answered
plot a surface from a three variable table
If not the below code, then use meshgrid instead of ndgrid This code takes a long time to execute !! The internal triangulation...

10 months ago | 0

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latex interpreter greek symbols
https://www.mathworks.com/help/matlab/creating_plots/greek-letters-and-special-characters-in-graph-text.html Use \nabla

10 months ago | 0

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Answered
Trouble using container with cell type for key and structure array for values..
struct values are not permitted. keys = 100:110; values = struct('abc', num2cell(1:11)) containers.Map(keys, values)

10 months ago | 0

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Answered
How to call .dll without header file
The header files is necessary for identifying function "signatures" -- knowing what datatype each function parameter is. So the...

10 months ago | 0

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Answered
I cannot find R2023a installer. In the drop-down, there is only R2024b.
That can happen if you do not have a MATLAB license registered against your MATLAB Central account.

10 months ago | 1