Matlab Definition and 1000 Threads

Hello participants. Can anyone help me in the code of loading wavs... I am getting some error... Function for the Code is... function [wavs,fs] = load_wavs(directory) % Initialize variables data = 0; fs = 0; % Load the wavs if(nargin < 1), D = dir; else D = dir(directory); end for i=2 ...

I'm studying the work of Theo Jansen and want to derive a set of general equations for motion, velocity and acceleration at each point of his linkage mechanism. I've read a general equation can be derived through the use of vector loops but I am having some trouble as my equations have 10...

I have a table of data points to be subtracted by another table of data points. I have succeed in subtracting the y values of each data point successfully, but it is the x values of each data point in that I have trouble. m =10; SubDataList=Table[{DataList[[i,All,2]]-BGData[[All,2]]},{i,1,m}]...

Hi! Here is my m-file for Fourier series plot: clear clc syms n a0=input('Enter coefficient a0: '); an=input('Enter coefficient an: '); bn=input('Enter coefficient bn: '); a=input('Enter lower boundary: '); b=input('Enter upper boundary: '); t=linspace(a,b,10000); sum=0; for n=1:10 %%n could...

Hi everyone, I am trying to differentiate a function by means of Richardson Extrapolation in MATLAB. However, I could not run the program. Here are the outputs and its codes. Could anyone explain to me what is my mistake? The codes are based on "Numerical Methods Using MATLAB by John H. Matthews...

I am trying to simulate the probability of rejecting a good batch for a probability of \(0.94\) using the Binomial Probability Law. My two cases are \[ P[k\geq 95] = \sum_{k = 95}^{100}\binom{100}{k}p^k(1 - p)^{100 - k} \] and \[ P[k\geq 98] = \sum_{k = 98}^{100}\binom{100}{k}p^k(1 - p)^{100 -...

Homework Statement Smog begins to build up again immediately after a Santa Ana wind passes through the basin. The volumetric flow rate through the basin has dropped to ##1.67*10^{12} \frac{ft^3}{hr}##. Plot the concentration of carbon monoxide in the basin as a function of time for up to 72...

How do I estimate the pdf from a random variable \(X\) where \(X = U_1 - U_2\) and \(U_i\) are uniform random variables? In the code below, I used unifrnd(-5, 5, 1000, 1) which generated a 1000x1 vector of uniform random number between -5 and 5. How do I estimate the PDF for X? rng; X =...

Hello everyone, I'm new here and new to Matlab. I hope I do place the post in the right place. First of all, thanks for viewing my post. Please bear with my English. I tried my best to explain everything clear. If you have any question about anything I wrote or spot any fault, please tell...

Homework Statement hi, i am having some problem with a code in matlab. my code is: t = 30; H= 30; h= 3; n = H/h; qqq= 10; a= 3; b = .2; k= 0.04; Lo= 100; g= 9.81; for i = 1:t q(i) = 0; for j = 1:n nl = qqq + (j*h)/(a + b*(j*h)); nlt = nl*(0.0172*log(i) + 1); q(i) = q(i) +...

Homework Statement I'm trying to make a theoretical Bode Amplitude plot of the following circuit in Matlab: The transfer functions is given by ##T=\frac{V_{out}}{V_{in}}=\frac{R_2}{R_2+z_p}## ##z_p=R_p|| j \omega L || \frac{1}{j \omega C} = \frac{R_p}{1+ j R_p (\omega C -...

hello. I have a MATLAB skeleton provided because i want to model a distribution with a circular geometry. all in all, i want the 3d graph of the code to be some type of cylinder. This is the code: % flat step condition for ii=1:nHi, for jj=1:nHj, if (X(ii)/R_P)<1 &...

HI please help me this could someone verify it for me please find attachement clc; clear all; k=0; s=0; N=inf; for i=1:N s=s+(1/(k^2+1)); k=k+1; end syms x n a0=1/pi*int(cosh(x),-pi,pi); an=1/pi*int(cosh(x)*cos(n*x),-pi,pi); bn=1/pi*int(cosh(x)*sin(n*x),-pi,pi); fs=0...

I want to solve the following differential equation using MATLAB and thus want to plot between x & y. dy/dx=(l*siny-b)/(sinx*cos(y-x)) boundary condition:at x=0;y=sine inverse of(b/l);

Homework Statement I'm trying to make a theoretical Bode plot of a High pass filter (made up of a capacitor and a resistor). The transfer function is: ##T=\frac{V_{out}}{V_{in}}= \frac{R}{R+1/(j\omega C)} = \frac{1}{1-j\omega_0 / \omega}## With a corner frequency of 5 kHz or in...

This is a part MATLAB and part math question. I know for the shaded region, I would usually do ##A_{shaded} = \int_{inter(2)}^{inter(3)} f_{1}(x) \mathrm{d}x - \int_{inter(2)}^{inter(3)} f_{2}(x) \mathrm{d}x## However, since it appears they want the function handle to be just one line, am I...

Homework Statement In this problem, we will demonstrate the Central Limit Theorem by a virtual test that involves rolling of dice. To this end, you will create a function, with the following declaration line function [avgDice, histDice] = rollDice(NumDice, NumRolls) ##\bullet## NumDice: the...

Two M-files one contains differential equations and another one to run and plot the graphs. since i am using ode solver, it has two files to run. THERE ARE 4 MATLAB CODES WITH 4 SEPARATE MATLAB M-FLIES BUT 2 M-FILES TO PRODUCE 3 PLOTS AND ANOTHER 2 M-FILES TO PRODUCE ANOTHER 3 GRAPHS. BUT I...

Homework Statement Write a line of MATLAB code that uses the cell array A to generate the string 'Cal Golden Bears'Homework Equations The Attempt at a Solution A = {'Cal', 'Golden', 'Bears', [5 7], {[1 2 3 4]}} A = 'Cal' 'Golden' 'Bears' [1x2 double] {1x1 cell} The...

[b]1. The problem statement. Create a function in MATLAB for a simulation of a automated robot vacuum to avoid obstacles while cleaning an undisclosed floor plan. the floor plan which will be in the form of a matrix not known beforehand. The robot (represented by a value of 1) can move...

Homework Statement Find the stable/unstable manifold for the nonlinear system dx/dt=y^2-(x+1)^2; dy/dt=-x Homework Equations The Attempt at a Solution I'm trying to solve the below nonlinear system using Matlab, but got the following warning message. Any idea...

Hello, I have been working on this Truss problem and have not managed to get it right. I have checked my equations over and over and everything seems to check out, but I only get 4/24 on the autograder. Here is my paper worked out. Here is my Code. Because I don't like the opposite sign...

Since i am using MATLAB ode23s solver, it contains two MATLAB files . One contain the differential equations and another contains plotting and to run the m-files. The code are working perfectly. Now i want to know the time step size that is using on the plot. How can i get the output of time...

Homework Statement I am working on Problem #2 in the attached PDF Homework Equations The Attempt at a Solution When I run this right now, I get an error in my first conditional for if the word is not in the index. How do I say that the word does not exist in the index? Any other...

Hello, I am using MATLAB to simulate a Fraunhofer diffraction pattern for a given aperture, but I have a little question. Hope someone can help. Sorry I am just a high school student and does not completely understand all mathematic deductions about Fraunhofer Diffraction on Wikipedia. I...

Hi everyone, I have a rather fundamental question about building oscillator wavefunctions numerically. I'm using Matlab. Since it's 1/√(2nn!∏)*exp(-x2/2)*Hn(x), the normalization term tends to zero rapidly. So for very large N (N>=152 in Matlab) it is zero to machine precision! Though asymptotic...

Homework Statement I am working on Problem #2 in the attached PDF Homework Equations The Attempt at a Solution I am trying to understand what they are saying in (b) as far as creating the double array. Does that mean I concatenate strIn with keyL? Also, how do I remove the last...

Hi, Can someone explain me the division operation in the picture. First for left division we use (.\ ) not only ( \ ) And it is strange that when we divide first column of A by first column of B( here first column of B is 44) how can we find -5.1250 ?

Homework Statement Hardware redundancy is important in many real-world engineering systems. Specifically, installing multiple sensors that measure the same quantity provides a level of safety in the event that one instrument fails during the mission lifetime. You do not want an expensive...

Homework Statement In this problem, you will write code that computes the Kronecker product of two arrays. Suppose A is a numeric array of size r-by-c and B is a numeric array of size n-by-m. Then the Kronecker product of A with B is a numeric array, of dimension rn-by-cm, defined as:Homework...

Homework Statement Attached imageHomework Equations The Attempt at a Solution I am basing my code off a template I found in a textbook for using loops to create an array. If I didn't find this example I don't think I would even know where to begin with this. Here is what I came up with so far...

Homework Statement (a) Suppose you decide to invest money in a Certificate of Deposit (CD). Write code that assigns to the variable FinalValue the final value of the CD based on the following variables: Investment: the initial amount of money invested in the CD, Rate: the annual...

I am trying to solve 3 differentail equations(Lorenz equations) using ode solver: ode23s in Matlab. Here are the 3 lorenz equations: dc/dt= alpha*I*(1-c) + c*(- k_f - k_d - k_n * s - k_p*(1-q)) ds/dt = lambda_b * c* P_C *(1-s)- lambda_r *(1-q)*s dq/dt = (1-q)* k_p * c *(P_C /...

Homework Statement Often times, a program accepts input from a user, and needs to check the validity of the input, and then produce useful and informative error messages if the input is invalid. Suppose that uiVal is a variable representing the user's input, and that errorCode is an 1-by-0...

Homework Statement Hello, I am working on problems 6-14 on the attached PDF. Don't be scared off, they are just one line of code each. I got number 6 correct, and I got partial credit on 7 and 8, but I am trying to figure out why it is not right. Homework Equations The Attempt at a...

I am trying to solve 3 non-linear system of 3 variables using the Newton-raphson method in matlab. Here are the 3 non-linear equations: \begin{equation} c[\alpha I+ k_f+k_d+k_ns+k_p(1-q)]-I \alpha =0 \end{equation} \begin{equation} s[\lambda_b c P_C +\lambda_r (1-q)]- \lambda_b c P_C =0...

Homework Statement Just a heads up, this is a problem with parts (a) - (o). I am working on (k). I am working on problem 5 in the attached PDF. I will show my code for the other parts. We were told to use N = 5 while writing the code for debugging and testing, but run N = 500 for the real...

I am trying to solve 3 non-linear system of 3 variables using the Newton-raphson method in matlab. Here are the three equations: \begin{equation} c[\alpha I+ k_f+k_d+k_ns+k_p(1-q)]-I \alpha =0 \end{equation} \begin{equation} s[\lambda_b c P_C +\lambda_r (1-q)]- \lambda_b c P_C =0 \end{equation}...

Forgive me if this sounds really stupid. I am a new Matlab user, and I have about 200 data sets from various samples in the naming format "varname_sample_daily" and i wish to remove the "daily" portion of it from the variable name through an automated process (i.e change all file names to just...

Homework Statement Let sentence1, string1, and string2 be three variables whose values are character strings. Using only the MATLAB function strfind and array concatenation, write code that will replace the first occurrence of string1 in sentence1 with string2, assigning the result to...

Homework Statement Homework Equations The Attempt at a Solution Hello, I am having some confusion over the notation used in matlab. I don't really know what they mean A = [1:3; 4:6; 7:9] A = 1 2 3 4 5 6 7 8 9 A(1:2, 1:2) ans = 1 2...

I have MATLAB R2013a. I am wondering why dmcode will not work.

Hi, is there anyone familiar with rate equation solving using Matlab? I need help on this

Hi, all I have to do a project but I need some guidance. I have to make MATLAB draw bending moment and shear force diagrams of a beam which have to be loaded with a distributed load, a single force, and a single moment. First I have to make MATLAB draw a beam like in the picture.

Hi, there is an example of beams in matlab. Can somebody articulate? What is setbeam(EI, L, BC_Spec) I know it is not an array and also I do not know it is physical meaning. what is Load_Spec = [0 0.5 1.2]; and here beamf(Load_Spec) is assigned to y but what is plotbeam(y)

Does MATLAB solve differential equations?

For my B.Eng project, I'm optimizing the thermal efficiency of a boiler using genetic algorithm in MATLAB. I'm finding it very tough to write my fitness function, constraint equations and upload my initial population which is a set of data from my case study plant. for boiler thermal...

This definitely isn't a homework question as the work is already done, I'm just trying to make my presentation neater for some reports I'm turning in. I am comparing theoretical data collected from a filter, to the actual data collected. I want to overlay the two to make the comparison. I am...

I can't model the potentiometer in speed governor control system by MATLAB even I know the input of it is pu and the output is voltage but when I run the program it has an error occur I want to see what wrong it is. Help me please

Homework Statement Below is a {MATLAB}code for Bragg mirror. How can I implement the code to create an FP resonator? Homework Equations The Attempt at a Solution %User input parameters num_layers = input('The Number of Layers in the structure = '); r_index1 = input('refractive...