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 3 matches
- 18 Jun 2021, 09:15
- Forum: Errors during model validation and/or estimation.
- Topic: Errors when estimating the RPL in WTP space
- Replies: 5
- Views: 6212
Re: Errors when estimating the RPL in WTP space
Thank you so much for your reply. I understand better the importance of using high numbers of halton draws and I would like to know more about it: Can I use lower number of draws if I have only 4 random parameters? I'm still trying with new starting values and different data specifications (e.g., di...
- 12 Jun 2021, 16:54
- Forum: Errors during model validation and/or estimation.
- Topic: Errors when estimating the RPL in WTP space
- Replies: 5
- Views: 6212
Re: Errors when estimating the RPL in WTP space
Dear Prof.Hess, Many thanks for your apply. I have changed the starting values to zero for all non-price parameters. It still can't converge. I have tried with the mixlogitwtp package in Stata. The model converged with 300 halton draws. But when I try to run the model with higher numbers of halton d...
- 12 Jun 2021, 08:08
- Forum: Errors during model validation and/or estimation.
- Topic: Errors when estimating the RPL in WTP space
- Replies: 5
- Views: 6212
Errors when estimating the RPL in WTP space
Dear developers of the Apollo package, Thanks a lot for having developed such as great package. I'm trying to run a RPL in WTP space following the example_16. My code : # ################################################################# # #### LOAD LIBRARY AND DEFINE CORE SETTINGS #### # ###########...