ApolloChoiceModelling forum

Hii, I am estimating ICLV model with two Latent Classes. My model is quite complex and computationally burdensome (extremely time consuming). The model has 7 latent variables. With original specifications, where I kept all 7 LVs as random parameters in apollo_randCoeff. But it could not finished est...

Hi Prof. Hess, I am facing a similar issue. I am computing latent-class latent-variable model. It has 7 random parameters (all LVs) and a total of 24 OL models for LVs. It is running since last 20 days on my 8 core PC (I am using 7 cores for computation). I have around 7200 observations for 702 IDs....

Hi David, Thank you for the reply. Yes, I started with the MNL model only. I got the results, used those estimates for MMNL model with IVTT as random where I got this error. I will update the apollo and play with increasing draws again to check with both these errors. I will try to estimate and come...

Hi, Yes, I have tried with simpler model where only IVTT was taken as random, however the issue was coming. Keeping that apart, should I try with more than 500 draws? When I used sole IVTT as random with classical estimation, I get an another error- Error in if (sum(inClassProb[[cc]]) == 0) stop(&qu...

Hi Prof. Stephane, I am facing a similar issue with my study. I am estimating 2-class LC model. I have tried several specifications and also modified initial coefficients values based on MNL model. The code is: ## Clear memory rm(list = ls()) ## Load apollo library library(apollo) ## Initialise code...

Hi Stephane,

Thank you for the reply. Yes, I followed that it's a warning.

I have tried HB model several times. I am getting NaN everytime. Can you suggest how to avoid getting extreme values?

Hi, I am facing a similar issue with another set of data. I am starting with the simpler MNL model on SP data. In my data, I have two-level choice sets: when an individual choose to travel with public transport in upper level SCEs, he/she will get another set of SCEs for access/egress to the public ...

Hi, Stephane Thank you for addressing the issue. However, the error still persist: Error in apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : SPECIFICATION ISSUE - Parameter lambda_comfort does not influence the log-likelihood of your model! When I remove related specification, the ...

Hi Stephen, Thank you for the reply. Sorry for posting different code. Please review this code. I could handle previous one. But the error seems to be different now. Error in apollo_checkArguments(apollo_probabilities, apollo_randCoeff, : SYNTAX ISSUE - The arguments for apollo_randCoeff need to be ...

I am trying to develop an ICLV model with binary logit. I get the results for parameter estimates but could not compute the covariance matrix and subsequently SE. Please note that I have tried several specifications with trail & error looking to the large coefficients, changing priors (started w...