An open exchange for the MATLAB and Simulink user community
Why do I get the 'We have detected suspicious behavior' prompt? kA03q0000015O7gCAE 000184625
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I'm trying to write an equation with e, but I assume it would just take it as an undeclared variable.
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This example project can be used as a reference design to get started with designing Battery Management System with MATLAB and Simulink.
An algorithm for manifold learning and dimension reduction.
Online optimization of energy storage actions in a microgrid given system constraints and pricing
PID controller simulator on an LTI system w/ or w/o input delays
MATLAB/Simulink Based Modelling of Solar Photovoltaic Cell, Panel and Array
MATLAB-Simulink model of IEEE 33 Bus System (Baran and Wu, 1989)
Learn how to deploy an algorithm to an FPGA using MATLAB and Simulink.
BESS are commonly used for load leveling, peak shaving, load shifting applications and etc.
Rad/s is nice for mechanical people, but I'm an EE, and I much prefer Hertz. It should be something simple, but I can't find it in the help.
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Simscape electrolyzer converting water and electricity (wind/solar renewable sources) into H2 gas. Alkaline technology included.
Cynthia Brewer's ColorBrewer palettes, ported to MATLAB, with nice interpolation.
Virtual labs and mechanisms for studying controls.
Hello, i am trying to make a bode plot of the transfer function of a twin-t notch filter, that i am analyzing. I was able to produce the transfer function, and the bode plot by hand, but i am struggling to do it in Matlab, here is what i have so far: r=320; %Resistance c=100*10^-9; %Capactiance p=(...
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Example files for MATLAB and Simulink Robotics Arena walking robot videos.
%Data Given N = 51; mu = 0.1; %Pa dt = 0.01; %delta time dr = 0.0002; %radius between the points rho = 1000; %kg/m3 k = [0,0.1,0.25,0.5,0.85]; %time R = 0.01; %m [r] = d_gridpoint(R); %Constant Break Down q = (mu*dt)/(rho*dr^2); p = (mu*dt)./(2*rho*r*dr); e = (2*mu*dt)/(rho*dr^2); aw = (q)-(p); ap ...
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I am trying to find zero-crossings of a function in Matlab and plot the points where zero-crossing occurs. However, i am not able to find an easy way. I tried and Matlab fnzeros, but i can't understand the spmak and x,y used in these function. The function for which i want to find zero crossing...
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I'm using Dell precision 7510 with preinstalled Ubuntu 14.04(I have the driver the NVIDIA). I just downloaded the MATLAB R2017a and I run into the following error. I just searched and found it's not just me who have the same problem. I wonder if this problem is fixable? To put it in another...
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How can I save the MATLAB command window output to a text file? kA00Z000001DXuqSAG 000100893
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When I plot the frequency domain the power is not 3 and 5 as I expect. I read the documentation for fft() and cannot figure out how to normalize my fft properly. Can someone explain the procedure to normalize the cosines and a Gaussian wave? Thanks clear all; %generate the signal t = 0:1/2000:.02; ...
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I want to ask the user if they want to EXP1 or EXP2. If the user enters '1' or '2', then I want to display "running exp 1 or 2", otherwise I want the program to display error message until the user enters '1' or '2'. prompt = input('Please enter 1 for E...
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In this model, a Microgrid test system based on the 14-busbar IEEE distribution system is proposed.
I have a histogram that I want to plot just as a simple line plot. I have tried: h = histogram(speed,'Normalization','probability') plot(h) But then I got an error message: Not enough input arguments. Does anyone know how I can do it? Many thanks!
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I am a python programmer and new to Matlab. Therefore, facing some basic issues. Please help me out with this. I am pasting my code here. Error Message: Index in position 1 is invalid. Array indices must be positive integers or logical values. Error in spectrum_uncompressed (line 30) X_per_bartlett...
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Hi, Community I wanna ask about how to do a Gaussian Filter in just 1D data.... So i have a data vector based on time series like this : And i want to filter the data by using Gaussian Filter. So, Anyone, How to do that? Thank you so much....
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Hello i have a 54000 x 10 matrix i want to split it 70% training and 30% testing whats the easiest way to do that ?
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Heart Sound Classification demo as explained in the Machine Learning eBook, but now expanded to demonstrate Wavelet scattering
I have one equations.Transfer function s/(s+0.9425).And I want transform z domain. Can you help me ? Thank you.
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A minimum length 2D planar bell nozzle is designed using MOC
I need to convert my matrix [648x2400 double] into integers value to use a mRMR function, but I do not know how to do that. I have tried to convert by uint8(matrix) or int8(matrix) but it does not give integers... And I always have this note: "Undefined function 'mrmr_mid_d' for input ...
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In today's blog, Khushin Lakhara from the Student Programs team at MathWorks will explore the concept of sensitivity analysis and its significance in engineering design. Over to you, Khushin... For this blog, our attention will be on the student competition score function, especially competiti...
Follow along with the code examples from the "Practical Deep Learning Examples with MATLAB" ebook
A toolbox for the computation of the Fast Marching algorithm in 2D and 3D.
this is the QAM modulation and demodulation tech. with speech example
abfload imports data in the Axon abf format (three different recording modes).
Hi I've a question about matlab simulink when I run a code, there are message "MATLAB cannot run this file because c:\~~~ shadows it. delete shadowing file and try again" what's the problem? And why this happen??
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Model of PMSM
How can I download 2011b version of MATLAB?
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This keeps coming up as an error, what am I doing wrong? prompt= 'State your name, Your Grace '; name=input(prompt);
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I'm new to MATLAB and am still getting used to the workspace. When I open a new file or script, it always comes out in a new window. How can I get it to be opened in the same window as the commands? Thanks!
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Let's say I am working in the directory: /home/username/Matlab/ I want to save (in a script) the directory one above the one I am working in (to use it later in the script), so: newdir='home/username'; But I am working in different computers, so the 'username' changes, thus I wa...
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Hello , I want to concatenate string and number in for loop requestID = Req_Check; for k = 1 : 10 requestID = requestID +1; end I am expecting requestID after for loop like Req_Check_1, Req_Check_2 ...Req_Check_10 How can I do this?
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Given a matrix, swap the 2nd & 3rd columns If a = [1 2 3 4; 1 2 3 4; 1 2 3 4; 1 2 3 4];then the result is ans = 1 3 2 4 1 3 2 4 1 3 2 4 1 3 2 4Perform a simple swap of the two middle columns. %%x = [1 2 3 4;1 2 3 4;1 2 3 4;1...
I closed the "Current Folder" window by mistake. How can I re-display it?
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I have two categorical column vectors of size 872-by-1. I want to calculate the Levenshtein distance between these two. When I am using the command 'editDistance' for this I am getting an error as "Argument 1 must be a string array, a character vector, or a cell array of character vect...
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y25=[1.875000000000000,3.046875000026040] How can I add 0 (zero) to the beginning of this array? I want to get the array y25=[0,1.875000000000000,3.046875000026040] Thank You.
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My code so far is below. I have the code so that it skips the first 19 lines and starts at line 20. However, I need to remove the NaN values that are in my data like Columns = [10;0.04500;0;NaN;NaN] for example. The line I have to remove the NaN's runs, it's just not removing them. I'm ...
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HVDC system with three level neutral-point clamped VSC
Generate an image pyramid or reconstruct from a pyramid.
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When running parcorr on a sample of normally distributed noise, I get some strange results like one illustrated below. Others are shown in the attached pdf and .mlx. When I try longer (1000) samples, the code seems to hang. The code is N=400; for itest=1:3 figure y=randn(1,N); stem(y,'o&...
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I want to use the vectorization option to speed up bvp4c while also providing analytical derivatives, but it is unclear to me how to vectorize these derivative functions which output matrices. Does vectorization of matrices extend into the higher dimensions? I could not find an example of this a...
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Hey, i want to obtain the open-loop response of a MIMO feedback loop in order to evaluate the stability margins. However, I am strugging with the Model Linearizer to perfectly linearize the open-loop. For analyzing the Linearization process, I have modelled a simple MIMO Feedback Loop System wit...
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I don't understand why LMMSE is used for both channel estimation and equalization..also in the code is mentioned that we use Single Tap FDe for equalization
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My goal is to simplify the for-loop below to a one line of code. Please see attached for a mat file storing the Headers variable. Many thanks for any recommendations % Find missing values in the Headers cell array: Ind1 = cellfun(@(X)any(ismissing(X),'all'), Headers); for i=1:numel(Ind1)...
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Photonic FDFD Toolbox is a MATLAB community toolbox project, providing intuitive framework for photonic device simulation using MATLAB.
These simulink model files were used for developing 5-DOF lightweight robot model, which was later manufactured..
This is the source code for paper “Software defect prediction based on support vector machine optimized by reverse differential chimp optimi
6G will unlock new use cases for wireless cellular networks, such as sensing and building digital twins. To support these innovations, integrating advanced link-level simulations with ray tracing delivers high simulation accuracy in performance evaluations. This combination enables precise modelling...
Pre-trained BiSeNet v2 semantic segmentation model for inference and transfer learning.
Imagine you are developing a new toolbox for MATLAB. You have a folder full of a few .m files defining a bunch of functions and you are thinking 'This would be useful for others, I'm going to make it...
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I am glad to inform and share with you all my new text book titled "Inverters and AC Drives Control, Modeling, and Simulation Using Simulink", Springer, 2024. This text book has nine chapters and three appendices. A separate "Instructor Manual" is rpovided with solutions to se...
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Over the last 5 years or so, the highest-traffic post on my MATLAB Central image processing blog was not actually about image processing; it was about changing the default line thickness in plots....
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This week's post is a suggestion from Raymond Estrada from MATLAB and Simulink Consulting Services. Raymond reached out recently to share a tip for verifying and validating logged signals in the code generated from Simulink.The ProblemIt's a common practice in the verification and validation...
Is pure electric or hybrid the future? This has been a topic of debate in the industry. Today, we invite Hao Zheng, a technical officer from the China Society of Automotive Engineers and the Formula...
To develop uifigure-based app, I wish MATLAB can provide something like uiquestdlg to replace questdlg without changing too much of the original code developed for figure-based app. Also, uiinputdlg - inputdlg and so on. Need to have easy uifigure replacement for inputdlg, export2wsdlg et...
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A look at the structure, and the eigenvalues and singular values of interesting test matrices.
You recently bought an electric kettle for your kitchen, and you want to estimate how much it costs to run every month. The kettle operates at 230V and consumes 2000W (or 2kW) when in use. You...
A voltage divider is a simple circuit used to obtain a reduced voltage from a higher voltage source using two resistors in series. The output voltage (Vout) is given by the formula:Where:Vout is...
In an electrical circuit, the current (III) flowing through an LED is determined using Ohm’s Law:Where:I is the current in amperes (A)V is the supply voltage in volts (V)Vf is the forward voltage...
Almost immediately after the DeepSeek-R1 AI models were made available to the world, people started asking how you can use them in MATLAB. Late last week, Vasileios Papanastasiou, a software test engineer at MathWorks, posted how to do this on LinkedIn and this morning I tried out his instructions f...
In this blog post we are going to show you how to use the newest MATLAB functions to: Import models from TensorFlow and PyTorch into MATLAB Export models from MATLAB to TensorFlow and PyTorch This...
Do you conduct research on 'Engineered Systems'?If you are in the business of building or conducting research on 'Engineered Systems' there's a good chance that you are a user of MathWorks' tools. At MathWorks we talk about 'Engineered Systems' all the time but I don&...
Everyone's talking about Large Language Models (LLMs) and a huge number of you are using them too. Here are 4 ways to make use of them in the MathWorks ecosystem right now, no matter what your skill...
This model demonstrates an ESS powered by solar which integrates renewable energy sources with an efficient battery storage mechanism
This week I received a series of interesting questions on the basics of putting together a simulation of a control loop involving a Simscape continuous plant and a discrete controller. The questions are summarized in this image:Here are my answers to those questions.Discrete ControllerI recommend im...
Customize scenes in Unreal® Editor for co-simulation with Simulink®.
This topic is for discussing highlights to the current R2025a Pre-release. R2025a Pre-release highlights One of the changes is the built-in support for Dark Mode and Themes. Personally I find Dark...
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In the past two years, large language models have brought us significant changes, leading to the emergence of programming tools such as GitHub Copilot, Tabnine, Kite, CodeGPT, Replit, Cursor, and many others. Most of these tools support code writing by providing auto-completion, prompts, and sugg...
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Starfish Optimization Algorithm (SFOA) is a novel bio-inspired metaheuristic for solving optimization problems.
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Hello everyone, I’m planning a new PC build and am currently undecided about which CPU to choose. I understand that AMD CPUs have faced some slower performance in MATLAB due to Intel MKL but I...
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On 27th February María Elena Gavilán Alfonso and I will be giving an online seminar that has been a while in the making. We'll be covering MATLAB with Jupyter, Visual Studio Code, Python, Git and...
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You've probably heard about the DeepSeek AI models by now. Did you know you can run them on your own machine (assuming its powerful enough) and interact with them on MATLAB? In my latest blog post, I...
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Pretrained YOLO v8 networks for object detection and segmentation in MATLAB, with support for importing Python YOLO v8 models.
Remove the row that contain the max value in the matrix?If you like the problem, please like it :) %%x = [1 2 3 4 5 6 ...
Hi, I'm solving a system of equations . x=null(A); The problem is that due to a very wide range of values in the A matrix () the roundoff error result in inacceptably large relative errors in the...
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I have recently installed MATLAB 2024b in an Ubuntu 24.04.2 system. When starting MATLAB I obtain the following errors: com.jogamp.opengl.GLException: X11GLXDrawableFactory - Could not initialize shared resources for X11GraphicsDevice[type .x11, connection :0, unitID 0, handle 0x0, owner false, ...
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Remove the row that contain the min value in the matrix?If you like the problem, please give it a like:) %%x = [1 2 3 4 5 6 ...
Remove the column that contain the max value in the matrix?If you like the problem, please give it a like:) %%x = [1 2 3 4 5 6 ...
Remove the column that contain the min value in the matrix?If you like the problem, please give it a like:) %%x = [1 2 3 4 5 6 ...
Hello, I have been encountering several times a day for a few weeks an error when updating my data stored on Thingspeak (computerized hive parameters). The return code of my Arduinos is 211! But I...
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Delete rows with specific properites as following:Find rows that have a negative value in any element of the row and delete it.Check if the last element of the row is equal of bigger than 24 and...
I 'm using contour option in Matlab R2014a to plot many curves: contour(x,y,c,cilevels); with cilevels = [0.0,.005,0.019]; but I need to select one curve (level) from the contour: the option peaks is not working? and I have tried : contour(x,y,c,[1 1]); but it was error also? could you pleas...
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