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
- 22 Mar 2021, 20:48
- Forum: Errors during model validation and/or estimation.
- Topic: An error when using Mixed Logit model
- Replies: 3
- Views: 6407
Re: An error when using Mixed Logit model
Hi Stephane, Thanks for your reply. I use Apollo 0.2.4. I edit my script based on your reply and find your suggestions help me a lot. 1) There is only one row per individual in my dataset and this is a subset of my dataset. It should not be treated as a panel structure. Therefore, if I want to conti...
- 21 Mar 2021, 19:43
- Forum: Errors during model validation and/or estimation.
- Topic: An error when using Mixed Logit model
- Replies: 3
- Views: 6407
An error when using Mixed Logit model
Hi everyone, #My estimation reports an error message that "Error in v[r] : object of type 'closure' is not subsettable". #please find the attached dataset for your reference # Thanks for your help in advance. #Here is my entire code rm(list = ls()) library(apollo) apollo_initialise() ### S...
- 17 Mar 2021, 20:10
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Structure a dataset with four choice sets and three options for each choice set
- Replies: 1
- Views: 7090
Structure a dataset with four choice sets and three options for each choice set
Dear all, I would like to analyze a dataset using the mixed logit model (based on Apollo_example_14). The dataset is a survey dataset and each respondent was presented with four choice sets (1,2,3, and 4). For each choice set, there are three options (option A, option B, and status quo). And there a...