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
- 30 Sep 2020, 17:03
- Forum: Estimation results
- Topic: NA & Inf in results
- Replies: 1
- Views: 5307
NA & Inf in results
Hi I have some serious problems with my model output and I don't know where the problem is. All of the values in the output are NA or Inf. I send you my model and its output in the following and it will be my appreciate if you help me to correct it. This is my code: # ###############################...
- 24 Sep 2020, 03:58
- Forum: Models and estimation
- Topic: initial function value
- Replies: 2
- Views: 5818
Re: initial function value
yes, I understand.
thanks for responding.
thanks for responding.
- 24 Sep 2020, 03:55
- Forum: Errors during model validation and/or estimation.
- Topic: max iteration
- Replies: 2
- Views: 5240
Re: max iteration
thanks a lot. I did it after you said and I'm waiting for the results.
- 23 Sep 2020, 19:29
- Forum: Models and estimation
- Topic: initial function value
- Replies: 2
- Views: 5818
initial function value
Hi
is it possible to input a specific initial function value for MNL model? and if so, how can I do that?
is it possible to input a specific initial function value for MNL model? and if so, how can I do that?
- 23 Sep 2020, 19:17
- Forum: Errors during model validation and/or estimation.
- Topic: max iteration
- Replies: 2
- Views: 5240
max iteration
Hi I've got an error because the iterations for esmitating the initial value in my MNL model didn't go farther than 200 which is the apollo default. How can I increase this default? is it possible? "Why does my estimation fail, saying the maximum number of iterations has been reached? The defau...