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Questions tagged [convergence]

303 questions
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Convcode in optimx / Synth in R

I've been using the Synth package (which uses optimx for the optimization) and I can't find the answer to whether Synth gives a non-convergence error when it doesn't converge. I can see in the help file for optimx that, by default, it does not save…
Ainhoa
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Convergence error for development version of lme4 - after R3.1.0

I am having the same problem as previous post from dmartin but the solution presented has not being working to my dataset. trying to fit: model<-glmer(nb~habitat*stigmatype+(1|sitecode/stigmaspecies), family=Gamma(link=log)) Warning…
Carine
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Recording non-convergence in SAS NLIN

I have a question about SAS-proc nlin. I'm performing the procedure for 10000 simulations. Lots of them do not converge and give me wrong results. I would like to add a binary variable to my output table that says that this itteration did not…
PerrySun
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cannot test the convergence of neural network

I'm using Weka multilayer-perceptron classifier to do classifications. I want to know after exactly how many epochs the neural network converges (weights don't update any more). I'm using its Java API, but I cannot figure out a way to get the weight…
J Freebird
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Lessen degree of perspective in 3D grid (reduce convergence)

Please see the following image: Which mathematical method or POV-Ray/OpenGL command will lessen the convergence of a grid like this? (The grid converges too quickly; theta should be 90 degrees, matching the center line, for this…
user2689489
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Change perspective in POV-Ray? (less convergence)

Can you change the perspective in POV-Ray, so that convergence between parallel lines does not look so steep? E.g. change this angle (the convergence of the checkered floor into the distance) here To an angle like this I want it to seem like you're…
user2689489
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Finding a number iteratively - algorithm design

I'm trying to design an algorithm that will find a price for me given a set of rules. Current Situation We currently set the 'price' of all products to £0.01 and set a 'line_crossed' property to false. We calculate the margin at £0.01 and, while it…
Kali_89
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Determine whether a recursive function converges

Consider the following recursive factorial function: fact(n) = if (n = 0) return 1 return n * fact(n - 1) The above function converges for all positive integers including zero. However it doesn't converge for negative integers. Next,…
Aadit M Shah
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Is there a better mechanism for testing convergence?

I am calculating a value using Newton method, and I use a for loop to test if it is converged or not. But I feel like using a fix value inside the for loop is not a best way to do so. Any suggestion? double startingRate = 0.1; double…
user1701840
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Understanding convergence proof (Momentum algorithm)

I am trying to understand the convergence analysis/derivation of the momentum algorithm, or the stochastic heavy ball algorithm, using the regret bound analysis from different research papers. https://ieeexplore.ieee.org/document/7330562 -…
Ayushya Pare
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Mixed linear model failed to converge in R

I have conducted a Mixed linear model in R and in the past, everything went well. But now, there is a weird warning message and I don't know how to fix it. Maybe you have got an idea what I should do next, thanks in advance! Here is the warning…
seboe
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Issue about mpi4py with MCMC autoemcee library

I am using a MCMC code (Monte-Carlo Markov-Chain) to test a model and see if it is validated. I launch this MCMC with MPI for Python using 64 processors. This MCMC is called automecee : https://johannesbuchner.github.io/autoemcee/index.html Once…
guizmo133
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Running club convegence approach with unbalanced panel data in stata

Hello Community Members, I have data for Indian manufacturing industries from year 2000 to 2020. This data has been categorized as per manufacturing activities and across states. Problem: Suppose I am checking for the club convergence for Iron and…
vikas choudhary
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Why future prediction LSTM model converges so fast? Is there a solution?

I am new to LSTM model. I used LSTM model to predict time-serial error of sales. This is the plots of trained, validated and both. enter image description here I thought that the model predicted short-term fluctuation. But when I predict future…
ILS
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Why does the Python function not return the expected representation of the Pandas column?

I calculate the root search function in the dichotomy() equation using the dichotomy method and then output the values using the print_dichotomy() decorator. I believe that in the end I will see the columns root - the value of the function at the…
Alex_Kazantsev
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