Important: Read this before posting to this forum
- 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.
- 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
- Before asking a question on the forum, users are kindly requested to follow these steps:
- Check that the same issue has not already been addressed in the forum - there is a search tool.
- 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
- Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
- Make sure that R is using the latest official release of Apollo.
- Users can check which version they are running by entering packageVersion("apollo").
- Then check what is the latest full release (not development version) at http://www.ApolloChoiceModelling.com/code.html.
- To update to the latest official version, just enter install.packages("apollo"). To update to a development version, download the appropriate binary file from http://www.ApolloChoiceModelling.com/code.html, and install the package from file
- If the above steps do not resolve the issue, then users should follow these steps when posting a question:
- provide full details on the issue, including the entire code and output, including any error messages
- posts will not immediately appear on the forum, but will be checked by a moderator first. This may take a day or two at busy times. There is no need to submit the post multiple times.
Search found 7 matches
- 11 Dec 2023, 13:03
- Forum: Installation and updating
- Topic: Wrong results when using the latest version
- Replies: 1
- Views: 2916
Wrong results when using the latest version
Hi, I updated Apollo to the latest version(0.3.1), but when I ran the case(using the same code and data of case: Hybrid_LC_with_OL), the results were inconsistent with those of running version 0.2.9, and many parameters were estimated to be NA, the two latent class probabilities are not true as well...
- 21 Nov 2023, 15:12
- Forum: Model estimation
- Topic: latent class model with panel term
- Replies: 1
- Views: 7679
latent class model with panel term
Hi, I want to add the panel term in the latent class model, the panel term is assumed to vary over individuals but be constant over choice situation for each individual, the results show that the efficients values of one class are very high while another are normal. Could you please tell me how to a...
- 24 Oct 2023, 15:21
- Forum: Errors during model validation and/or estimation.
- Topic: latent class with latent variable
- Replies: 8
- Views: 23181
Re: latent class with latent variable
Hi, Stephane,
I revised the code according to your suggestion, the problem was solved! Thanks very much for your help!
Best wishes,
Xiaolei
I revised the code according to your suggestion, the problem was solved! Thanks very much for your help!
Best wishes,
Xiaolei
- 11 Oct 2023, 12:58
- Forum: Errors during model validation and/or estimation.
- Topic: latent class with latent variable
- Replies: 8
- Views: 23181
Re: latent class with latent variable
Hi, Stephane, Thanks for your previous reply. I want to use the socio-demographic(gender, income) and latent variable to allocate participants (class-membership model), other alternative variables are used for class-specific model utility. I tried many times, but the results always have NaN.However,...
- 02 Oct 2023, 16:30
- Forum: Errors during model validation and/or estimation.
- Topic: latent class with latent variable
- Replies: 8
- Views: 23181
Re: latent class with latent variable
Dear Stephane, Thanks very much for your help. I think I solved the problem by setting the separate probability functions. It took me a long time to solve this problem, thanks for your advice and the post in the forum, which gives me lots of inspiration. Now the the coefficient value seems fine, see...
- 28 Sep 2023, 21:05
- Forum: Errors during model validation and/or estimation.
- Topic: latent class with latent variable
- Replies: 8
- Views: 23181
Re: latent class with latent variable
Hi, Stephane, Thanks very much for your reply. Yes, I tried to build the latent class model without latent variable(LV), and the model performed well. I also built the hybrid choice model including LV, which didn’t include the latent class sub-model, the model ran normally as well. However, when I c...
- 22 Sep 2023, 15:38
- Forum: Errors during model validation and/or estimation.
- Topic: latent class with latent variable
- Replies: 8
- Views: 23181
latent class with latent variable
Hi, I am trying to run a hybrid latent class choice model (just like Hybrid_LC_with_OL examples), and the latent variables(LVs) is the part of the class membership model instead of a class-specific model, in other words, the class allocation model is a function of the LV, however, the results show t...