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 5 matches
- 23 Apr 2021, 09:09
- Forum: Bug reports
- Topic: Error during MDCEV prediction
- Replies: 6
- Views: 14309
Re: Error during MDCEV prediction
Thank you very much !
- 22 Apr 2021, 09:01
- Forum: Bug reports
- Topic: Error during MDCEV prediction
- Replies: 6
- Views: 14309
Re: Error during MDCEV prediction
I sent you the data thank you very much
- 22 Apr 2021, 08:27
- Forum: Bug reports
- Topic: Error during MDCEV prediction
- Replies: 6
- Views: 14309
Re: Error during MDCEV prediction
I tested it in version 0.1.0 and 0.2.4 version 0.1.0: Error in if ((sum(lambda < V_trans[i, 2:NALT])) < (M)) { : missing value where TRUE/FALSE needed version 0.2.4: Error in if (M > sum(phk > lambda) || M > sum(phk > 0)) { : missing value where TRUE/FALSE needed Kind regards, Paul
- 21 Apr 2021, 18:17
- Forum: Bug reports
- Topic: Error during MDCEV prediction
- Replies: 6
- Views: 14309
Error during MDCEV prediction
Dear Apollo team, I'm encountering the following error while using apollo_prediction for my MDCEV model: Error in if (M > sum(phk > lambda) || M > sum(phk > 0)) { : missing value where TRUE/FALSE needed or in version 0.1.0: Error in if ((sum(lambda < V_trans[i, 2:NALT])) < (M)) { : missing value whe...
- 15 Mar 2021, 14:52
- Forum: Model estimation
- Topic: Fitting variant of MDCEV by coding probabilities within apollo_probabilities
- Replies: 1
- Views: 5709
Fitting variant of MDCEV by coding probabilities within apollo_probabilities
Hi, I'm currently trying to fit the Ly-profile for the MDCEV model. I coded the loglikelihoods and the model converged using the maxLik package. However, I would like to be able to estimate the model within the Apollo framework but currently I obtain the following error: "Error in apollo_insert...