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:
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Search found 3 matches

by arohamirai1
03 Oct 2024, 12:42
Forum: Errors during model validation and/or estimation.
Topic: Errors in estimating LC-MMNL
Replies: 6
Views: 39529

Re: Errors in estimating LC-MMNL

Dear Stephane,

Thank you very much for looking at the code. These are very helpful and I have resolved the issues.

Could I ask a follow-up question presented in the Apollo manual: I see in the manual example that you assumed a normal distribution for the parameter delta_a. Is there a reason ...
by arohamirai1
01 Oct 2024, 11:41
Forum: Errors during model validation and/or estimation.
Topic: Errors in estimating LC-MMNL
Replies: 6
Views: 39529

Re: Errors in estimating LC-MMNL

Dear Stephane,

Thank you for the solution. However, I still got the same error message. I tried a couple of other ways but still didn't work. Could you help to have a further look and let me know the mistakes in my code please. I will very appreciate it. Thank you very much.

Best wishes,
Hangjian
by arohamirai1
24 Sep 2024, 13:53
Forum: Errors during model validation and/or estimation.
Topic: Errors in estimating LC-MMNL
Replies: 6
Views: 39529

Errors in estimating LC-MMNL

Dear Stephane and David,

Thank you for providing this platform for Appolo users. I have a question about a LC-MMNL model used for identifying ANA behaviour.

Setting
Choices are allocated to two classes, the first class is the ANA class where only cost and ASC parameters are freely estimated ...