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 2 matches
- 10 Dec 2023, 19:10
- Forum: Model specification
- Topic: MDCEV gamma parameterisation
- Replies: 1
- Views: 1671
MDCEV gamma parameterisation
Hi! I am trying to estimate a MDCEV model in which the gamma term is parameterised. However, I get the following warning: Preparing user-defined functions. WARNING: The pre-processing of 'apollo_probabilities' failed in initial testing. Your model may still run, but this indicates a potential proble...
- 17 Sep 2023, 09:10
- Forum: Models and estimation
- Topic: GEV draws for the MDCNEV
- Replies: 1
- Views: 5063
GEV draws for the MDCNEV
Hi, this is a bit of a mix of questions regarding the generation of GEV draws for forecasting using an MDCNEV model and application of the MDCNEV in general. I have been trying to wrap my head around how to generate GEV draws, as I ultimately want to apply an MDCNEV model within an agent-based model...