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Thomas on 08 March 2023

How do i use rlocfind command to find the range of values of K (feedback gain) for which the closed-loop ststem is stable. For example for the sytem below: In the tutorial it is hinted that rlocfind is the correct appraoch: Many thanks in advance,

mohsen on 01 February 2014

Hi everyone im kinda new with filter design in Matlab and in need of some help.. So basically i need to reduce the noise in an record and playback system based on DSP TMS320c6713. Right now im stuck in writing the code for Moving average filter (exponential or simple). so can somebody help me out o...

Emil Brandt on 18 January 2017

Hey guys! I'm fairly new with signal processing in matlab. I have some labdata that are corrupted by noise. I would like to make a (butterworth) bandpass filter between approx. 0.5 kHz and 1.5 kHz. I have tried a lot of different approaches from browsing the net. My latest attempt looks like th...

ilyas mustafa on 24 April 2016

I have a time series data, i need make a matrix,.

Hannah on 20 August 2021

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...

Riyadh Muttaleb on 02 May 2016

I have 'file.fig' that consists from 50 figures. I would like to convert them to jpeg. How can I do that? Thanks Riyadh

MathWorks Support Team on 02 November 2023

My computer has 32 logical cores but by default Parallel Computing Toolbox will only start a number of workers equal to the number of physical cores I have. How do I enable Parallel Computing Toolbox to use all the logical cores? Is it beneficial? kA00Z000001DXHUSA4 000100390

Thomas on 09 March 2023

How do I use a root locus to find a value of K such that the damping ratio of dominant closed loop poles is 0.7071? Using the following TF and associated root locus. Many thanks

Adnan on 25 May 2014

I have a simple circuit for which I just need to obtain transfer function using Simulink. I have attached the image below. Any help would be appreciated. Thanks http://obrazki.elektroda.pl/7608514200_1400978484.jpg

Daniel Wells on 05 February 2012

I am trying to estimate the Jacobian of a multivariable function in Matlab. I came across a method here: http://www.mathworks.com/support/solutions/en/data/1-CMM53T/index.html?product=OP&solution=1-CMM53T that recommends using the function lsqnonlin. As an example, I define the function f = @(x...

Shannon on 31 October 2013

I'm trying to create a loop which takes the name of a regular polygon from the user. It should be case insensitive and the program should have cases for a pentagon, hexagon, heptagon, octagon, and nonagon all with fixed side length 10 (I have precalculated the areas, I just want the program to o...

Mayar Kamel on 02 January 2017

I need to run two scripts in parallel and simultaneously, run the first script and the second script at the same time.

Clyde S on 03 January 2017

Hi, All: I am trying to run Matlab parallel computing in a Mac Pro, but I encounter the following error message when I start the parallel pool using “parpool” command: ————————————————— parpool Starting parallel pool (parpool) using the 'LocalDefaultProfile' profile ... Error using parpool ...

Abdelhakim Souidi on 21 June 2022

I have read an audio signal .wav with a Sampling frequency fs = 44100 [y Fs]= audioread('as6.mp3'); [N,P]=size(y); ts=1/Fs; tmax=(N-1)*ts; t=0:ts:tmax; I am interested to study the frequencies under 8000 of this signal with the function downsampling () so, How can I do it

Siddhanth Sunil Shah on 07 January 2022

A = [-3 5 -7 0; 0.5 -1.5 0.5 -7.5;-5 0 -3 0; -0.5 -5 0 .7]; B = [1 0 0; 0 -1 0; -2 0 0; 0 1 2]; C = [1 0 0 0; 0 -1 0 0]; D = [-1 0 0; 2 0 0]; S = ss(A, B, C, D) G = tf(SS) % Compute Poles poles = eig(A) %Compute Zeros zeros = tzero(A,B,C,D) Gss = minreal( ss( S ) ) When I run this code i get the fo...

Paul Eluard on 23 April 2016

Hello ! I have about 500 pics and i'd like to make a video with. Also, i have a vector with the time each image should appear. (Img10 at tome(10)) Is it possible ? Thank you so much, Loic.

MathWorks Support Team on 23 June 2011

I would like to see MATLAB supported on Fedora or RedHat Enterprise Linux. kA0i00000007sUFCAY 000033186

Mario Malizia on 24 March 2022

Hello! So I got into this university project on an Acrome 2D Ball-Balancing (Ball and Plate system). The servos are linked through and Arduino to the computer. I have as an input the voltage of the ball with respect to the x axis and y axis. We, as a team, are actually trying to estimate the servo ...

Sara Romanella on 27 November 2021

Hi! I have 8 subjects whose scores were collected on two time points (pre vs. post), in various different conditions (for now I only add cond1 and cond2). The data is reported on a table like here below. I was hoping to write a code for a repeated measure ANOVA 2x2 to check time, condition, and tim...

WANDA GRECO on 21 February 2022

perc=0.8; ecg_simulato=[]; for k=1:length(RRi_samples) lungh_onda=round(perc*RRi_samples(k)); lungh_segmento=RRi_samples(k)- lungh_onda;%metto degli zeri fino al %battito successivo ecg_simulato=[ecg_simulato ecg(lungh_onda) zeros(1,lungh_segmento)]; Error using ese_process_ecg_2122_senza_grafico (...

badfish66 on 24 April 2016

Hi I have been using lsline to produce a linear line of bext fit for two datasets. I was wondering if there was a similar command that produced the line of best fit and provided an equation (in the form y=mx+c) for said line. Many Thanks

MathWorks Support Team on 22 June 2011

I would like to know how to superimpose images in MATLAB. kA0i00000007sfyCAA 000033913

Chetan Fadnis on 19 September 2021

Write a MATLAB code to 1) Generate a band limited signal (at extremely high sampling rate to approximate it as a continuous signal) 2) Plot the signal in Time Domain. 3) Take the FFT of the signal and plot the magnitude and phase of the signal spectrum and show it is a bandlimited signal. 4) Genera...

saeed on 02 January 2017

Hi to everybody i have a problem running these codes .its a linear segment price in power generation economic dispatch matlab code in line 17 AND SOME OTHER LINES THIS ERROR COMES: Variable F appears to change size on every loop iteration I DONT KNOW HOW TO SOLVE THAT!

Dhyan Hariprasad on 02 May 2017

Why are the fft plot mirrored? <</matlabcentral/answers/uploaded_files/76772/noloadhorzhalffft.jpg>>

Paul T John on 17 August 2011

Hi all, I'm trying out to find the wavelength of the wave seen in this image: http://www.flickr.com/photos/66468892@N07/6052890522/ I did the fftshift of the red channel [ im(:,:,1) ] and got this image: http://www.flickr.com/photos/66468892@N07/6052339583/ I did the fftshift of the grayscale [...

Iro on 19 February 2014

Hi, I have some scatterplots and I want to check the relationships between the variables which resemble exponential and logarithmic functions. I have tried to use the functions nlinfit fittype fit but so far not successfully (poor fitting or code not working at all). How can I check the curves for ...

Nahum Sacay on 21 August 2021

I need help for my school activity my professor given to us, when i try the code there is "Unrecognized function or variable 'wavread'." on the first line of the code. Here is the code: [x,fs]=wavread('c:\matlab\work\waed.wav'); %read your waed.wav xlen=length(x); %calcula...

Murali Krishna AG on 26 October 2021

Let he is estimated vector and h is original vector which is unknown. The Mean squared error (MSE) is defined as norm(he-h)^2. Now , how to get h original vector using he and MSE? ..pls help me

Jackson on 08 December 2021

Given the following signal: x(nT)= cos(2*pi *fc* nT)where fc=100KHz and (1/T )= 300, 000 samples per second. Resample x(nT) to a new rate of (6/5) times the original rate. plot the time domain and frequency domain output at each sample rate change stage and the final spectrum output at the new samp...

Diver on 28 June 2015

Hi; I new to SVM, hence, please consider this when you answer the question. I'm trying to classify IRIS data using matlab. I choose fitcecoc becouse it can classify multiple features and classes. Next, I need to search for the best value for sigma. My understanding I need to do something called...

Léon on 04 November 2011

May somebody point me to the correct solution? I want the critical t-value for given parameters. For example t = 63.66 when I have two tails, 1 degree of freedom and looking at the 99% confidence intervall. See: Is there already a function within matlab? Thanks a lot!

Ahmed Alsmaeil on 20 August 2021

Dear all, I want to calculate the surface area of the object in this image. I appreciate the help!

MathWorks Support Team on 01 November 2013

How do I overlay an image over a background image in a figure window in MATLAB 8.1 R2013a? kA0i00000008AreCAE 000047618

Sonoma Rich on 05 August 2011

How can I high pass filter an image (A) using IMFILTER(A,H)? What must the filter matrix (H) be to perform a high pass filter?

Kumar Kulala on 18 September 2021

Can anyone help me with this please

Luke Peterson on 23 May 2022

Hello, I'm trying to plot the FFT of a rect pulse but the outcome is not so "pretty". I generate a rectangular pulse inside this range (-29.5, 29.5) and the A = 7. When I try to plot the FFT the outcome it's just an angle and I have to zoom in to see the sinc. You got any idea how ...

Martin Doherty on 08 December 2021

I am trying to understand how the fft function in MATLAB deals with the case of a complex signal used as input. For a real input signal, I understand that the fft of a given signal results in a vector of Fourier coefficients that contains both positive and negative frequencies including the DC offs...

Miti Patel on 12 April 2022

I am trying to create a clustered bar graph from this data. times = [5,20,40,60,120]; ravgdm = 35.3689 34.2453 31.9268 29.3701 33.5380 30.4708 32.3411 28.3500 27.8087 28.9000 19.7406 21.9029 20.6332 18.9298 20.4248 My code looks like this. figure() times = [5,20,40,60,120]; bcv = bar(times,ravgdm) ...

L'O.G. on 10 July 2022

I've been trying to understand how to design and implement an anti-aliasing filter. I'm really stuck. I have an analytic function in the time doman that I calculate according to a model, and then I want to process my results numerically, so I sample at a high rate that I choose to be 10 kHz...

Emir Mulic on 04 May 2022

For my class project I have to create an app which loads an image and allows you to change Red, blue, green colors and the brightness. I have sucessfully coded this app. Now I have to add a button which would allow me to rotate the image 90 degrees each time. The requirements is that I do not use an...

Anna-Maria on 19 August 2014

Hi, I would like to plot up to 20 bodeplots in the same graph with a specified colororder. I have tried two different ways of doing this, but none of them works: 1) figure; color_order = copper(20); set(gcf,'DefaultAxesColorOrder',color_order) hold all for i = 1:20 bodeplot(models{i}); end I...

Edward on 17 February 2014

Hi all, I've recently set up MATLAB's Distributed Computing Server for my cluster of 30 workers across three machines. When I run the parpool command for the first time in a MATLAB session, it takes over 30 minutes to connect to the 30 workers. Thereafter, it takes less than 3 minutes. Anyo...

ramdas patil on 14 June 2014

I want to generate and play **sound for frequencies 100Hz and 200Hz tones for 10 sec and 5 sec respectively using MATLAB With sampling frequency as 20500 Hz .Also i want to plot their frequecy spectrum** .Is it possible to do this using MATLAB?

Jimmy Neutron on 27 November 2021

I am looking for the values in the first row of S of an HSI color model. Unfortunately, I do not get the desired values. I assume it is my conversion from rgb to hsi. Instead I use rgb2hsv. Does this make any difference? R = [ 120 20 30; 170 20 70; 120 140 70 ] G = [ 40 150 20; 20 110 20; 25 20 20 ...

SG on 28 July 2015

I'm displaying an image and then using 'axis image' to keep the right proportions. This re-sizing process places the resulting image in the middle of the subplot, but I'd like to align the image to the left. Is there a way to achieve this? RGB = imread('C:\Users\...\file.png'...

azzendix on 02 May 2017

How to write the inverse of the filter function? I use a filter function with input x to get output y. I want to get input x back. y = filter(b,a,x,zi) y = <inverse filter to get original input x>

Motiur on 26 May 2014

How are errors in Matlab represented? For example I have obtained the following after training a dataset using LinearModel.fit( ). I am confused about the Root Mean Squared Error, is the error 0.243 % or 24.3 %. I want to know the value of RMSE in terms of percentage, and is it represented here in ...

Mark on 07 February 2023

I want my MATLAB code to generate the random samples of uncertainties in the three parameters (155, 189, 232) using Latin Hypercube sampling which has 15 %, 20 % and 30 % relative uncertainties. The maximum and minimum uncertainity should cover more than 90 % of the of the distribution probability ...

Menno van Dam on 20 August 2021

Hello, I have a 1-dimensional array with index values of extremes I found in a much larger dataset, ordered from lowest to highest. I wish to seek out if there is any data clustering within this array. What's the simplest way to do this? The total amount of clusters is unknown beforehand. A clu...