Matlab Definition and 1000 Threads

Does anyone know of a great text that shows how to set up FEA in MATLAB in detail. I have wrote out the sort of pre pseudo code from John Andersons - Computational Fluid Dynamics now I just need to build it out in code. I am old school with the hand sketches, hopefully this does not get me a...

Hi, I felt like I have to learn more than one coding language, and wanted to strengthen my coding skills in general. I am good with Relap5 but I want to learn OpenFoam. is what I did logical and going to be worth the pain ? also I only have the Relap5 version of a windows ,is it possible to run...

Hi, Mostly i work with Octave / Matlab but i am trying to get into python also. Lately i have a couple problems where my numbers can't be represented in binary64 or float64 default format because they exceed the max of 1.8x10^308. Is there a common way people deal with this (without toolkits)...

Hello, Does anyone know if a finite element skeleton source code exists. Finite element can be used for structural memebers, gas dynamics, etc. But the over all stepping software is the same and then just input the core equations. My application is for pseudo one dimensional compressible...

greetings. I designed a system on simulink. it is missing a pmsm. I found a block on simpowersystems in simulink nde matlab. I hope that this engine provides a nominal power of 96kw and maximum of 100kw. so how to test it? to verify that this engine can deliver these two powers? cordially. said.

Hi, I have a curve, impedance magnitude vs frequency. i would like to convert this curve to electrical conductivity vs time. how can i do that?

Hello PF, I am considering some options in my upcoming PC build and want to choose the one that performed best in MATLAB. What I mostly do is velocimetry with a big amount of points, image processing, statistical analysis. My options are between 2 CPUs: AMD Ryzen 2700 - for the 8 physical...

Hello, How can I evaluate the following nested integral in MATLAB for a general value of ##K## {\int\limits_{u_1=0}^{\gamma}\int\limits_{u_2=0}^{\gamma-U_1}\cdots \int\limits_{u_{K}=0}^{\gamma-\sum_{k=1}^{K-1}U_k}}f_{U_1}(u_1)f_{U_2}(u_2)\cdots f_{U_{K}}(u_{K})\,du_1du_2\cdots du_{K} where...

Hello everyone. I was wondering if someone could tell me how to write the next line of Mathematica code in Matlab. x = Sum [ Sqrt [ vals[ [ j ] ] ] * vecs [ [ j, All ] ] * z [ [ j ] ] , {j,1,10} vals is a eigenvalues vector, vecs is a eigenvector matrix and z is a vector of random variables...

Homework Statement I would like to convert this R code into matlab. This code perform a calculation of beta coefficient based on Detrended cross correlation analysis. Homework Equations require(tseries) require(fracdiff) require(matrixStats)DCCA_beta_avg<-function(y,x,smin,smax,step){...

Here's what I have to do: 1) I arbitrary give a first value to the variable ##x_b##. Let's say ##x^{(0)}_b = 0.3## 2) I find ##x_D## by evaluating this integral: $$ln(\frac {52.32} {100}) = \int_{0.5}^{x^{(0)}_b} \frac {dx} {x^{(0)}_D - x}$$ 3) I use the value I got for ## x^{(0)}_D## to...

Hi, I am trying to gain insight into using stationary vs. rotating coordinate frames for natural frequency calculations. I have seen many FE codes suggest that critical frequencies can be calculated differently in rotating and inertial frames, so i wanted to do a 1D calc to see for myself how...

I would like to solve this system, which is a sets of non linear quadratic equations, the system needed to be solved can be expressed in general as follow: ϒϒ'C – ϒα = B Where ϒ=(ϒ1,ϒ2,...ϒn)’ is a column vector and ϒ’ its transpose C=(c1,c2,…,cn)’ and B=(b1,b2,…bn)’ are a columns vector And...

Homework Statement Write code for solving the integral ##\int_{0}^{x}e^{-t^2}dx## using simpsons method and then plot the function from ##x = 0## to ##x = 5## with ##0.1## increment. Homework Equations 3. The Attempt at a Solution [/B] I was told that the best way to plot the function is to...

Hello everyone. I am trying to generate the KL expansion of a stochastic process. I use a Monte Carlo sampling method to generate the process, which involves two random variables and I compare it with it's theoretical mean for 50 values of time and they look quite similar. Then, I calculate the...

i have a assignment for my MATLAB (first year) class, and I am slightly confused om what exactly i should be coding. im not struggling with the coding part, but what i am suppose to code. im used to coding based on what it is needed. So, for my project, I am suppose to represent the forces...

Homework Statement I have to write a MATLAB script that calculates the horizontal distance of a projectile fired from a cannon set at 45 degrees by a compressed spring. I know that the spring constant is 6 lb/in, the unstretched length of the spring is 1 foot, the mass of the projectile is 0.1...

Hello everyone, I'm trying to make a MATLAB program which read a file.dat and then do a histogram This what I did Data2=importdata('Ma.DAT'); R1=Data2.data(:,17) R1(R1>-9.9) L = 0:0.1:8; histc(R1,L) bar(L,histc(R1,L),'histc') xlabel('R1') ylabel('counts') [FONT=PT Sans...

I have a first order bernoullis differential equation. I need to solve this in matlab. Can anyone help me?

Hello, I am writing a program in MATLAB that reads a file.dat, I also want to draw by bin of z and degraded the color for example for z between 0 and 1 put the color red, for z between 1 and 2 put blue. But I do not know how to do it Here is my code Data2=importdata('fichier.dat')...

Hi PF! I'm trying to export two matrices ##A## and ##B## from Mathematica into MATLAB. I can export one just fine; so far what I write is SetDirectory[NotebookDirectory[]] Export["data.mat", {A}] Do you know how I can export two variables at a time and then how I can export directly into...

Hi, I am trying to code ultrasonic transducer radiation in water using angular spectrum of plane waves. I am having difficulties in the sampling and fft. If anybody has an idea about this can you please help me out? I can paste the code once i get some response. Thanks for your help!

Homework Statement Verify Superposition Principle using Matlab, given a DC source of 100V, an AC source of 50V, 60Hz and three resistances, R1=10 ohms, R2=20 ohms and R3=15 ohms. I created the circuit below and ran the program. Result: Homework Equations None, just running the program...

I have a python script for which the input data are coming from Matlab. I have tried to use pymatlab, but it is failing. Can anyone suggest any other method?

Homework Statement I am trying to create this plot in MatLab I'm starting out doing the simplest one, no drag, no wind. simple kinematics, right? but I can not get my code to run. Homework Equations Kinematic Equations The Attempt at a Solution close all clear all clc %%defining variables...

Homework Statement I need to write a program in Matlab that accomplishes this graph: I keep getting an error on Line31 Column 161 about unexpected parenthesis. They look balanced to me. If I take one away from either side, I get an error that I am short a parenthesis. I also need to change...

Hello everyone. I am trying to create a matrix in Matlab with two columns which should look like as follow: 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9... 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1... Has anyone programed something like this before?

Hi, I made the following command in MATLAB to test for the following: \begin{equation} \langle T\psi,\phi\rangle=\langle \psi, T\phi\rangle \end{equation} %Self-adjoint test syms x a = (diff(exp(-x^2)))*exp(-2*x^2) b = (diff(exp(-2*x^2)))*exp(-x^2) W = int(a, x) P = int(b, x) O=W-P and it is...

So here is the program. I've spent a few hour trying to follow it. I numbered each line and after the code will try to explain what I think is going on in each line. I'm completely new to Matlab, and programming is a great weakness to me. I need help. 01. nuclei=zeros(1,100); 02. t=nuclei...

Hello, below is the screenshot from the book INTRODUCTION TO MODERN DIGITAL HOLOGRAPHY With MATLAB (TING-CHUNG POON, JUNG-PING LIU). This book is free to download. There is a script for Fraunhofer diffraction pattern and equation 1.40 is Fraunhofer diffraction formula in terms of Fourier...

Consider, I have a dynamic system model for air compressor. Which means I have modeled the system by including its physics. Does this means I also included the transients of the system? What I think is, when i modeled any system with equations, I think that includes the transients. Is it...

Homework Statement Homework EquationsThe Attempt at a Solution I'm taking Computational Physics. And I am trying to learn how to program in matlab. But I don't understand the author's code and what it is in MATLAB code. Can someone help me?

I was reading this article (https://www.nature.com/articles/srep40083) about designing a panoramic lens with transformation optics, and wanted to try to play around with modifying the coordinate transformations. I contacted one of the authors of the article, and she mentioned that she plotted...

For my signals and system class were creating music. I am given a structure with three variables, frequency/notes, duration, and pulse. ex: frequency(in note numbers which i then convert to frequencies)[44 45 47 50...]. duration[2 1 1 3 4...] with pulse duration being .25s and pulse[1 3 4 5 8...

I have data from tiltmeter. It has 3 components (time, x, and y) and stations. I use Matlab for calculating the data (.csv) until i get some plots. I have two plots, time-x and time-y. Each plot has a trendline. So that means i have two trendlines in two plots. Assume that time is z and x is...

Hi everyone, I am currently working on a project in Physics analyzing the possibility of magnetic fields protecting against radiation particles such as fully ionized nuclei or electrons. I wrote a code in Matlab that simulates a 3-D magnetic field based on a combination of wires and wire loops...

Hi all, I have a spatial probability density function that is dependent on ##x##, space and ##t##, time. I am able to make a plot for spatial probability density for each point in time by specifying ##t## values by using the fplot function. However, I want an animation that allows me to see...

Hi PF! Suppose I have two functions ##f(x),\,g(y)## that are numerically defined as vectors (i.e. ##g(y) = [0,1,4,9,16]:y = [0,1,2,3,4]## and say ##f(x) = [0,1,8,27,64]:x = [0,1,2,3,4]##) and am trying to compute $$\int_0^1 f(x) \int_x^1 g(y)\, dydx.$$ How would I do this in MATLAB? I could be...

This is a pretty dumb question, but I honestly just need some advice as to which option to go for. I'm in first year and one of my courses this term is computer science where we will be using matlab. Matlab isn't free- I know that, but my professor said we have two options available for us to...

I have finsihed my work on an orbit propagator in MATLAB and now I'm trying to simulate the orbit with the help of the main script. tspan=[0 :860]; Position and velocity y0(1,1)= 743322.3616 ; y0(2,1)= -6346021.219 ...

I'm working on a convolutional neural network project that classifies histopathological images of breast tumors. All my code is in python. Part of the image preprocessing involves appearance normalisation to account for the variation in histological staining. The only code for the preprocessing...

Hello, in my final project for System Control i have been stuck for some time on this following task What i cannot figure out is how to make all these condition work at the same time. When I tried designing a PD controller in sisotool or MATLAB for the i and ii part it worked but i couldn't...

Homework Statement MATLAB The funciton "rockdynamicstage" outputs a matrix 4 by x, where x is somthing around 300( varies). The funciton "rockdynamicstage" is within the funciton handle "sim" with an input of gama0. (PayMass,Masstages,Massfrac,Thstage,IspStage,ChangeTstage) ar parameters that...

Homework Statement So I've been tasked with designing and band pass filter for my signals class. We're given the specifications that it needs to go from 200-5000Hz, and we need to use a kaiser window as the window function. Homework Equations There are 2 parameters, beta and N, given by these...

Hello Everyone, I am not sure of when to use symbolic calculation and symbolic function in Matlab. For instance, we can set the domain of a function x=1:10 and plot the function y= x.^3+3 numerically to plot a graph and calculate numerically the derivatives, etc. That said, I am not sure of...

The MATLAB command plot plots points in a two-dimensional figure and connects them with straight line segments. So, here $y$ is a vector with $n$ entries $(1; y(1)); (2; y(2)); (3; y(3)); : : : ; (n; y(n)):$ So the MATLAB command is given below for an example: y = [1 -3 3 -4]; >> plot(y)...

Here is the code you input into matlab. Aini etc, are the initial values of the population densities. A for predator, B for Prey. % example for ODE and Gillespie % one reversible reaction b1 = .033; bo = .00047; a1 = .0022; ao = .00055; Aini = 5168; Bini = 34; %% Basic ODE simulation...

Hello! I'm trying to plot a best fit for some generated EQ data and I'm having issues with nlinfit. My code is as follows and when I try to run it, I get an error referring to the anonymous function ("test"), nlinfit (from Matlab), and not having enough input arguments. %Test function t =...

Copy and paste if you want to use any of this code. Its a simple iteration of converting biomass of elk into new wolves. % example for ODE and Gillespie % one reversible reaction b1 = .033; bo = .00047; a1 = .0022; ao = .00055; Aini = 5168; Bini = 34; %% Basic ODE simulation dt = 0.01...

Hi Could you please help me to fix the code below? I know that the code is completely wrong but I have tried to write it down so that you can get an idea what I'm trying to do. Thank you. %%file name fourier.m clear all; close all; clc; f = 0; %% 0 Hz to 100 Hz, with 0.1 step...