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 4 matches
- 26 Feb 2024, 15:27
- Forum: Model specification
- Topic: ICLV model specification in unlabelled form
- Replies: 8
- Views: 7647
Re: ICLV model specification in unlabelled form
Dear Stephane, I run a hybrid model once again but now without ASC and it works. However, in otput file I dont have "successful convergence" but rather "relative function convergence". It seems that there is a problem with ASC. Maybe I made a mistake in coding ASC? Below I provid...
- 26 Feb 2024, 13:58
- Forum: Model specification
- Topic: ICLV model specification in unlabelled form
- Replies: 8
- Views: 7647
Re: ICLV model specification in unlabelled form
Dear Stephane, I have also tried to estimate mixed logit model and have the same warning - Estimation failed. No covariance matrix to compute. Below there is a code: # ################################################################# # #### LOAD LIBRARY AND DEFINE CORE SETTINGS #### # ##############...
- 26 Feb 2024, 08:48
- Forum: Model specification
- Topic: ICLV model specification in unlabelled form
- Replies: 8
- Views: 7647
Re: ICLV model specification in unlabelled form
Dear Stephane, Below I paste the output. When it comes to covariance matrix, I paste only first three lines because there is always the same - NA. I will try MNL model and mixed logit model and will let you know in the next post. I started my estimation in R from hybrid model. Before, I run mixed lo...
- 22 Feb 2024, 18:40
- Forum: Model specification
- Topic: ICLV model specification in unlabelled form
- Replies: 8
- Views: 7647
Re: ICLV model specification in unlabelled form
Dear Stephane, I have similar case as Peter had but in my experiment I have 2 alternatives that differ between task and repondents and the third alternative which is always Status quo. I have six attributes - subsidies attribute which is continuous and treated as non-random and five other attributes...