Important: Read this before posting to this forum

  1. This forum is for questions related to the use of Apollo. We will answer some general choice modelling questions too, where appropriate, and time permitting. We cannot answer questions about how to estimate choice models with other software packages.
  2. There is a very detailed manual for Apollo available at http://www.ApolloChoiceModelling.com/manual.html. This contains detailed descriptions of the various Apollo functions, and numerous examples are available at http://www.ApolloChoiceModelling.com/examples.html. In addition, help files are available for all functions, using e.g. ?apollo_mnl
  3. Before asking a question on the forum, users are kindly requested to follow these steps:
    1. Check that the same issue has not already been addressed in the forum - there is a search tool.
    2. Ensure that the correct syntax has been used. For any function, detailed instructions are available directly in Apollo, e.g. by using ?apollo_mnl for apollo_mnl
    3. Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
    4. Make sure that R is using the latest official release of Apollo.
  4. If the above steps do not resolve the issue, then users should follow these steps when posting a question:
    1. provide full details on the issue, including the entire code and output, including any error messages
    2. posts will not immediately appear on the forum, but will be checked by a moderator first. We check the forum at least twice a week. It may thus take a couple of days for your post to appear and before we reply. There is no need to submit the post multiple times.

Search found 4 matches

by cdelosrios
23 Apr 2026, 16:56
Forum: Errors during model validation and/or estimation.
Topic: Individual weights error with LC model
Replies: 8
Views: 45553

Re: Individual weights error with LC model

Still runnning with the same eerror when running it like this


apollo_probabilities=function(apollo_beta, apollo_inputs, functionality="estimate"){

### Attach inputs and detach after function exit
apollo_attach(apollo_beta, apollo_inputs)
on.exit(apollo_detach(apollo_beta, apollo_inputs ...
by cdelosrios
23 Apr 2026, 15:00
Forum: Errors during model validation and/or estimation.
Topic: Individual weights error with LC model
Replies: 8
Views: 45553

Re: Individual weights error with LC model

Thank you.

I am coming back to this after a bit.

Indeed, agree with the draws, just trying to get a working code before doing it with the right specifications.

I tried your suggestion and I still cannot make that work. Is that what you menat or should the weighting be applied at some other point ...
by cdelosrios
20 Nov 2025, 16:01
Forum: Errors during model validation and/or estimation.
Topic: Individual weights error with LC model
Replies: 8
Views: 45553

Individual weights error with LC model

Hi,

I am running a basic LC model without any covariates, just to build up towards more complex classes. I am using individual weights in my estimation. I know for sure that the weights are correctly specified since I have already estimated RPL models using those weights without issues. However ...