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
- 12 May 2021, 10:39
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Error when generating intra-individual draws for mixed logit model
- Replies: 3
- Views: 9725
Re: Error when generating intra-individual draws for mixed logit model
Dear David, Thank you for your reply. I installed the v0.2.5 version from the link you provided. Unfortunately it still reports the same error when I use Sobol draws with Faure-Tezuka scrambling for the intra-individual draws. To be able to continue my analyses, I use plain Sobol draws for the intra...
- 30 Apr 2021, 15:38
- Forum: Data preparation, processing and pre-estimation analysis
- Topic: Error when generating intra-individual draws for mixed logit model
- Replies: 3
- Views: 9725
Error when generating intra-individual draws for mixed logit model
Dear all, I would like to run a mixed logit model with both inter- and intra-individual Sobol draws with Faure-Tezuka scrambling. However, I get an error message " Error in if (!any(scrambling == 0:3)) stop("invalid argument 'scrambling'") : missing value where TRUE/FALSE needed "...