Questions tagged [convergence]
303 questions
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Convergence of image reconstruction using genetic algorithm in Matlab
I'm implementing an image reconstruction method using genetic algorithm (for optimization). I randomly opted 10 population(each population is an image with intensity values in row major order) as follows
for i = 1:population_size
…
Celine
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MATLAB While loop for convergence
I'm attempting to write a while loop iteration such that it stops when my value converges. When the new value is only 1% different from the last, I want the code to stop. Here is the iterative relationship:
And here is my code thus far:
% Given…
Doug Fox
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How to keep a simulation from crashing when one application of the lrm function in rms cannot be fit?
I am running a Monte Carlo simulation with 1000 iterations. Within each iteration, I am fitting a weighted logistic regression model using the lrm function from the Harrell's rms package. The model is fit using this code: lrm(y ~ x,…
user66177
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SOR method does not converge
I have a SOR solution for 2D Laplace with Dirichlet condition in Python.
If omega is set to 1.0 (making it a Jacobi method), solution converges fine.
But using given omegas, target error cannot be reached because solution just goes wild at some…
epicenter
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Determining convergence rate of fsolve - Matlab
Suppose I'm solving a system of nonlinear equations. A simple example would be:
function example
x0 = [15; -2];
options = optimoptions('fsolve','Display','iter','TolFun',eps,'TolX',eps);
[x,fval,exitflag,output] =…
Maverick Red
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MATLAB train function stops immediately
I'm new to Neural Networks and I am trying to train an NN by simply loading two different time series data x and y, which are 300 x 1 vectors. x is the set of values of the predictor variable, and y is the dependent (output) variable. By the way, is…
jeff
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Mathematica. Integration of an oscillating function
I need help with an integral in Mathematica:
I need to calculate the integral of x^(1/4)*BesselJ[-1/4, a*x]*Cos[b*x] in the x variable (a and b are parameters) between 0 and Infinity.
The function is complicated and no analytic primitive exist, but…
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2 answers
Scala: Implementing a mathematical recursion with convergence
Many numerical problems are of the form:
initialize: x_0 = ...
iterate: x_i+1 = function(x_i) until convergence, e.g.,
|| x_i+1 - x_i || < epsilon
I'm wondering whether there is a nice way to write such an algorithm using…
bluenote10
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Convergence of value iteration
Why the termination condition of value-iteration algorithm
( example http://aima-java.googlecode.com/svn/trunk/aima-core/src/main/java/aima/core/probability/mdp/search/ValueIteration.java )
In the MDP (Markov Desicion Process) is
||Ui+1-Ui||<…
user34618
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initial value error while using gradient descent algorithm
Problem:
Initial value is 10000 and the solution is converging to 10000 instead of actual solution 1.
import numpy.linalg as nl
x_ini=10000
def obj(x):
f = x**2 - 2*x + 3
return f
def grad(x):
df = 2*x - 2
return…
RK S
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Parameter of convergence of bisection method. C code
I stuck with one formula in my code. Changed it many times in different ways but all the time my teacher say that it is not correct. I gave up and have no idea what else I can do. I think I just don't understand the formula correctly that's why I do…
Gelios
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Simpson Integration to Python : Can't get the output as expected
I have already implement this even() & simpson(), but can't get the desired output. Secondly getting error ([lambda x:1/x, 1, 11, 6]]) ZeroDivisionError: division by zero, can't understand this error
import math
import matplotlib
import…
Raza
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1 answer
Gelman.diag output decimal places
How can I change the number of decimal places my PSRF is outputted as in the gelman.diag function?
enter image description here
Stephanie
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Different random weight initialization leading to different performances
I'm training a 3D U-Net on an EM dataset of a brain. The objective is to segment neurons in it. During the experiments, I've noticed, different random initialization of the network leads to different performances. I evaluate the performance based on…
Optimus
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geometric series in c, wrong solution
I'm getting a wrong solution for this series: (-1/4)^(n+1)*(z-1)^n
For |z-1|<4 should the series tend to converge to -1/3+z
For z=0.5 should be the solution -2/7, but if i try to plot with c, the result is 0...
Here is my code:
#include…
