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  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 19 matches

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by punyabeet
02 Mar 2023, 12:36
Forum: Examples (existing and requests for new ones)
Topic: BW_Simultaneous
Replies: 2
Views: 32989

Re: BW_Simultaneous

Thanks for Prof. Hess for the explanation.
by punyabeet
20 Feb 2023, 20:57
Forum: Examples (existing and requests for new ones)
Topic: BW_Simultaneous
Replies: 2
Views: 32989

BW_Simultaneous

Dear Stephane

In the apollo example, BW_simultaneous.r, can you please explain the need to use the following line of code (line 114):

choiceVar = 10*best+worst,

Shouldn't it be best + worst?

Is it because of the 10 choice tasks in the drug choice data?

Regards
Punya
by punyabeet
03 Feb 2023, 15:30
Forum: Model specification
Topic: LCCM model with two choice models
Replies: 5
Views: 30461

Re: LCCM model with two choice models

Hi Prof Stephane

Thanks for the apollo forum. I tried to estimate LCCM with two choice models in each latent class with a similar specification as above. However, I keep getting the following error:

Error in apollo_validate(classAlloc_settings, modelType, functionality, :
Some of the names of ...
by punyabeet
24 Feb 2022, 12:41
Forum: Model specification
Topic: MDCEV model with time/individual specific covariates in gamma?
Replies: 5
Views: 18022

Re: MDCEV model with time/individual specific covariates in gamma?

Hi Prof Hess

Sorry for the delayed response. The reply to your query is that -
I want the correlation values between the panels i.e. between week 1 -week 2, week 1- week 3, and week2-week3 in the MDCEV model.

The other issue I am facing is that-
I get the following error message while doing the ...
by punyabeet
08 Feb 2022, 06:31
Forum: Models and estimation
Topic: Cluster Error In High Performance Computing
Replies: 2
Views: 28009

Re: Cluster Error In High Performance Computing

Apologies for the late reply. It is solved. It was an HPC error.

Thanks for the reply.
by punyabeet
07 Feb 2022, 20:31
Forum: Model specification
Topic: MDCEV model with time/individual specific covariates in gamma?
Replies: 5
Views: 18022

Re: MDCEV model with time/individual specific covariates in gamma?

Dear Prof. Hess and Prof. Palma

I just wanted to know is it possible to incorporate the intra-person correlation while estimating MDCEV? I have three non-work activities - Personal/Family Care (PC), Other Maintenance (Main), Recreation (REC), and three weeks of activity diary data of the same ...
by punyabeet
16 Jan 2022, 15:13
Forum: Models and estimation
Topic: Cluster Error In High Performance Computing
Replies: 2
Views: 28009

Cluster Error In High Performance Computing

Dear Prof Hess

I get the following error while estimating a mixed ICLV model in the HPC with 250 mlhs draws in the beginning. I am running R from Conda environment.

Error in socketAccept(socket = socket, blocking = TRUE, open = "a+b", :
all connections are in use
Calls: apollo_estimate ... apollo ...
by punyabeet
14 Jan 2022, 17:10
Forum: Model specification
Topic: MDCNEV
Replies: 2
Views: 10695

Re: MDCNEV

Thanks, Prof Hess for the clarification.
by punyabeet
13 Jan 2022, 20:52
Forum: Model specification
Topic: Mixed NL and CNL
Replies: 2
Views: 8536

Re: Mixed NL and CNL

Thanks, Prof Hess for the clarification.
by punyabeet
13 Jan 2022, 20:50
Forum: Model specification
Topic: MDCNEV
Replies: 2
Views: 10695

MDCNEV

Hi Prof Hess

Is the apollo package capable to estimate a cross-nested MDCEV model?
I tried to modify apollo_example_13.r and run the model but I get the following error :

Error in mdcnev_settings$mdcnevNests[[which(as.vector(mdcnev_settings$mdcnevStructure[, :
subscript out of bounds

These are ...

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