Matlab Definition and 1000 Threads

On the mathworkd website, they have a case example of Kalman filtering here. What is the system and measurement noise covariance in this example?

Hi, I tried to install MATLAB but came across with this problem. How can I figure out it?

Does anyone have a Matlab file for solving the stellar structure equations that they wouldn't mind passing along? I'm trying to settle an argument with a friend that they can't really be used to describe nuetron stars and I don't have much programming experience. Thanks, Alex

t = (0:0.0001:10); for ki = [0.625, 1.125] kp = 1.25; H = tf([0, 0, 2*kp, 2*ki], [1, 3, 2 + 2*kp, 2*ki]); step(H, t) for i = [1, 2] di = stepinfo(H) end hold on end legend('kp = 0.625', 'kp = 1.125'); I want the di loop to return d1 = all the data and d2 = all...

Dear Experts! I currently have a sets of data with different time interval and I plotted it into MATLAB from excel. Is there a way for me export the files or calculate the mean, standard deviation etc so that I can calculate error etc. It would be great if I could do it in Matlab. I am...

Homework Statement Hey there. I'm trying to plot a piecewise function in MATLAB and I'm having some decent success, but there's some things I'm wondering. Here's the function: http://gyazo.com/d3493a0c13096878acf5a501af8a7f66 Homework Equations The Attempt at a Solution My...

I have a 3 rad/s sine wave that I am sampling every 2 seconds. The slow sampling has created an alias of -0.14 rad/s. I have plotted this over the top of the original continuous time signal, please see attachment. My problem is that I only want to plot the first period of the discrete signal...

Matlab Simulink--Using PID controls? I need to use Simulink to determine an approximate numerical solution to the equation of motion for a robotic arm (image below). The equation of motion for the system is J (\theta)'' = \tau - mgl cos (\theta). (An ordinary, 2nd order nonlinear differential...

Hello, I have a problem synthesising the complex Fourier series using Matlab. The time domain periodic function is: -1, -1.0 ≤ t < -0.5 1 , -0.5≤ t <0.5 -1, 0.5 ≤ t < 1 The single non zero coefficient is: Cn = \frac{2}{\pi n}, Co is 0 (average is 0). f(t)= \sum Cn...

Homework Statement The problem was "Plot the following equation with MatLab, for values of x from -3 to 6. Homework Equations y = x^4 - 4x^3 - 6x^2 + 15 The Attempt at a Solution I created a function. function r = graph(x) for i = 1:x r(i) = i^4 - 4*i^3 - 6*i^2 + 15; end...

Homework Statement Generate 100 data points from a continuous uniform distribution with mean = 10 and variance = 4 Homework Equations u = (a+b)/2 var = (b-a)^2 / 12 r = a + (b-a).*rand(100,1); The Attempt at a Solution points = 100 m1 = 10 v1 = 4 syms a b [a...

Homework Statement Numerically integrate and plot the response of an underdamped system determined by m= 100 kg, k= 20,000 N/m, and c = 200 kg/s, subject to the initial conditions of x0 = 0.01 m and v0 = 0.1 m/s, and the applied force F(t)=150cos(5t). Then plot the exact response. Homework...

Homework Statement For my code for the communication system if I have a channel implies response {.3,.6,-.3} h=[.3 .6 -.3] How do I get ych=filter(h,l,s) to work? I get an error when I run it. I get an error, Error: The press ion on the left of the equals sign is not a valid target for an...

Hi. I've been given an assignment, a starters assignment I should say, for Matlab. This is mostly about learning the basic functions of the program and it's my first ever experience with it. I hope I'm posting in the correct sub-forum. Homework Statement We're given a triangle ABC...

Homework Statement Enter the following two commands, and copy and paste the output as your answer > rand("state",student_number0917); > rand(1) where student_number0917 is your student number with "0917" at the end and with "-" removed. For example, if your student number is 123-456-7...

Homework Statement u(n) = .4s(n)+.7s(n) -.1s(n-2)+v(n) where v(n) is zero mean and has variance 0.003 and uncorrelated with s(n) I want the autocorrelation is E[u(n-k)u(n)] I can solve it easily by hand which is the follow so r(k) = 0.663 for k =0, 0.21 for k=1 , -0.04 for k=2 and the rest...

Hi all, I have made a BSFC plot in MATLAB with engine data tested on an eddie current dyno, The code I used for it is: >> NP=40; >> [RP TP]=meshgrid(linspace(min(RPM),max(RPM),NP),linspace(min(Torque),max(Torque),NP)); >> BSFC_IT=griddata(RPM,Torque,BSFC,RP,TP); >> NC=12; >>...

Homework Statement Write a Matlab function to plot the displacement of a cantilevered beam under a point load. Annotate the figure’s axes and title the figure. In addition to creating the plot, the function should report (in the figure’s title!) the maximum deflection and angle between the...

Homework Statement Write a Matlab function to compute and plot real and reactive power consumed (or supplied) by a known impedance (the value of complex impedance should be used as the function’s input) as a function of either current or voltage (use a character: V or I as a second input) for...

Homework Statement Evaluate the following series ∑u(n) for n=1 → \infty in which u(n) is not known explicitly but is given in terms of a recurrence relation. You should stop the summation when u(n) < 10^(-8) u(n+1) = (u(n-1))^2 + (u(n))2 with u(1) = 0.5, u(2) = 0.6 Note 1:The lecturer...

Homework Statement For the 1st one you wouldn't really need MATLAB I guess to find the area under the curve, it is 0 and so is its energy. For the 2nd one I got A=1.73 and so E=2.99.Homework Equations area under curve = evaluate integral from t=t1 to t=t2. in this case t=-2 to t=5 since they...

This might be an unusual thread but is that i really can't figure out how to plot single points in 3D space using MatLab. I need to plot the points (1,0,0) , (0,1,0) and (0,0,1)

It is common for freshman students in engineering to use MATLAB? My son will be a freshman (Bio Engineering) in August and I'm tempted to encourage him to learn Octave or Scilab during the summer. He's in a Java class right now, so has some programming basics already. If he really won't...

Homework Statement Hello, I am working on a problem involves my using the Euler Method to approximate the differential equation \displaystyle \frac{df}{dt} = af(t) - b[f(t)]^2, both when b=0 and when b is not zero; and I am to compare the analytic solution to the approximate solution when b=0...

matlab halp! fplot() with 3-input argument function?? Homework Statement heres da link: http://postimg.org/image/uqqr3q0k3/ don't really need to look at that though. Its just a function in another file, I have to call it but it takes 3 input variables, problem with fplot is it only uses a...

Homework Statement Plot x(t) for a damped system of natural frequency w_n= 2 rad/s and initial conditions x_0= 1 mm and v_0 = o mm/s, for the following values of the damping ratio: z= 0.01, 0.2, 0.6, 0.1, 0.4 and 0.8 Homework Equations The Attempt at a Solution I began by defining...

How can I write proper language for these integrals in MatLab ? Your helps really appreciated. John Mark

Homework Statement \dot{} I'm given the following circuit http://imagizer.imageshack.us/v2/800x600q90/43/bwka.png Homework Equations The Attempt at a Solution I come up with the transfer function to be G(s) = \frac{s}{2+\frac{1}{s}}. The question asks me to Plot step...

So, this is going to be pretty hard for me to explain, or try to detail out since I only think I know what I'm asking, but I could be asking it with bad wording, so please bear with me and ask questions if need-be. Currently I have a 3D vector field that's being plotted which corresponds to...

How to increment a MATLAB "for" loop by an arbitrary value? I am creating a Matlab program that calculates corresponding temperatures for Celsius, Kelvin, Fahrenheit, and Rankine scales. I want to write my code so that it can handle an arbitrary temperature increment (a user-inputted value)...

Hi, Could You help me with problem mentioned in the topic? I copied translational data (3 column vectors) from modal analysis in Patran (from f06 file). Now I have problem in reproducing the results in Matlab. I am trying to draw normal modes in Matlab, but I haven't got much luck so far...

Hi guys I've been having some trouble plotting the p(x) and d(xy) atomic orbitals on Matlab. I have been given that p(x) = x*e^-(x^2 + y^2 + z^2)^0.5 and d(xy) = x*y*e^-(x^2 + y^2 x^2)^0.5 Now I want to plot these orbitals on MATLAB using mesh or the surf command and then plot the...

Hey PF! Does anyone recommend an effective way to self-learn matlab? What has worked for you? What have you heard that works for others? I realize MATLAB can be used for a variety of purposes, and as such it is difficult to learn the entire package, but I just want to get my hands dirty...

Good afternoon, I have created a column vector with many values however I want to know a specific value found in that vector. Specifically I want to know the 99th value of my column vector. Is there a command I can enter into mat lab that will give me the value I seek without having to...

ok I wrote my own FFT class and I now have MatLab on my computer. I am comparing my code to mat-lab. so my test i used it this : for (int y = 0; y < 100; y++) { double temp8 = (2D * (Math.Sin(2D * Math.PI * 4D * (double)y / 100D)))...

Is anyone here any good with MATLAB? I could do with some help. I want to use the ellipticF function as shown http://www.mathworks.co.uk/help/symbolic/mupad_ref/ellipticf.html. I just want to put in a number and it return another number (the answer). I want it to work like the ellipke...

Does anyone know how I might go about graphing the Z-Transform in 3D? It want it to look something like the picture below.

Homework Statement I need to evaluate a function using 4-point GQ. Homework Equations GQ theory The Attempt at a Solution I have got more of a programming issue in MATLAB. I am new to MATLAB. Actually this is for a numerical analysis course where we kind of learn MATLAB on the...

Matlab rook here, Suppose I'd want to plot the Gaussian for 10 different values for n:function gauss(c,n) = plot_gaussian.m x=-1*c:0.1:c; gauss(x,j)=sqrt(j./pi)*exp(-1*j.*x.^2); for j=1:n plot(x,y) end And then I'll type gauss(3,10) to plot 10 curves in the interval [-3,3] Also, if I'd...

Homework Statement So, as part of a numerical methods module that I'm taking I have to write a report and MATLAB program which deals with some sort of engineering/physics based problem. The report essentially just outlines and discusses the problem. It's the initial idea which I'm looking for a...

Hi everyone, this is my first post on the physics forums. I am trying to use the readtable command in Matlab to make a table from an Excel file. Matlab is still new to me so I'm running into problems a lot. When I input T = readtable('myfile.txt'), I get an error that says "? Undefined function...

Hello everyone I need to ask a tough question I have an integral I should plot in 3d from minus infinite to plus infinite it is known that this integral is hard but can be solved numerically I need it in MATLAB is it possible? Thank you

that's my programe : n=0; T=2; Ts=T/200; t=-T/2:Ts:T/2; for n=0:0.1:8; V= 0; V=V+8/pi^2*(-1)^n*sin(pi*(2*n+1)*t)/(2*n+1)^2; pause drawnow plot(t,V); end When T=2, write a Matlab program to visualize the Fourier series (with animation) and investigate the...

Should I take "Matlab for Physics"? So this is one of those questions... Next semester my Physics department is offering a special course "Matlab for Physics". It's being taught by a well known and respected professor so I'm doubly sure the content covered will be relevant to research in...

what is the function of 'pix' and 'shg' in MATLAB ?

Homework Statement My apologies if the error is an obvious one and many thanks in advance for any help given: I am trying to create a Matlab code that simulates Lifting Line Theory in order to provide an estimate of the lift and drag of a 3D wing. My hope is to later use this as part of...

Hi, I want to write a very simple code to plot the beam emittance knowing x,y,z and vx,vy,vz of each particle. I have generated with a tracking code a very simple beam (cone distribution with 1° divergence) and I want to compare the emittance of this beam with the one calculated by a...

Is there anyway around this problem? syms m,n; x1 = [0, 1, 4, m]; x2 = [3, n, 9, 27]; conv(x1,x2) Undefined function 'conv2' for input arguments of type 'sym'

I want a closed loop MATLAB simulation for a case study in power grid control: I'm planning to regulate the terminal voltage of a synchronous generator on overloading, by measuring the terminal voltage instantaneously, giving it to a rectifier and feeding the DC signal to the exciter (instead of...

I took this code from the agrawal book: nonlinear fiber optics and I wanted to see the results : %---specify input parameters clear all; distance= input('enter fiber length (in units of L_D)= '); beta2=input(' dispersion: 1 for normal, -1 for anomalous'); N=input('Nonlinear parameter N=')...