Dear Stephane,
Thanks a lot for helping me with this!
Best wishes,
Max
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 4 matches
- 16 Jun 2023, 07:55
- Forum: Estimation results
- Topic: Error with Hessian calculation in MNL model
- Replies: 6
- Views: 4950
- 15 Jun 2023, 13:40
- Forum: Estimation results
- Topic: Error with Hessian calculation in MNL model
- Replies: 6
- Views: 4950
Re: Error with Hessian calculation in MNL model
Hi Stephane,
I've just sent you an email with the data and code - thank you very much for helping me with this issue.
Best,
Max
I've just sent you an email with the data and code - thank you very much for helping me with this issue.
Best,
Max
- 13 Jun 2023, 10:16
- Forum: Estimation results
- Topic: Error with Hessian calculation in MNL model
- Replies: 6
- Views: 4950
Re: Error with Hessian calculation in MNL model
Dear Stephane, Thanks for getting back to me. I've run the same code with Apollo v.0.2.9 now, and I get the following output: Preparing user-defined functions. Testing likelihood function... Overview of choices for MNL model component : alt1 alt2 alt3 Times available 4626.00 4626.00 4626.00 Times ch...
- 30 May 2023, 12:43
- Forum: Estimation results
- Topic: Error with Hessian calculation in MNL model
- Replies: 6
- Views: 4950
Error with Hessian calculation in MNL model
Dear Apollo Team, I'm estimating preferences for ecosystem services using an MNL model. The choice experiment consists of four categorical attributes with two levels each (plus a "no change" option) and a monetary individual cost attribute with five levels. I've followed the MNL_SP example...