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.
Active topics
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Error in estimating model with Joint RP-SP and HCM
by Aditya249 » 27 Jan 2023, 09:37 » in Errors during model validation and/or estimation. - 7 Replies
- 95 Views
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Last post by stephanehess
03 Feb 2023, 08:50
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Predictions for post estimation
by JuliavB » 15 Dec 2022, 10:43 » in Post-estimation analysis/use of results - 8 Replies
- 108 Views
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Last post by stephanehess
03 Feb 2023, 08:47
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Simulation of new choice - market share of new product
by LucaN » 21 Nov 2022, 10:43 » in Post-estimation analysis/use of results - 3 Replies
- 251 Views
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Last post by stephanehess
02 Feb 2023, 15:34
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Error in Bayesian estimation between Apollo versions
by dasham » 20 May 2021, 15:00 » in Bug reports - 3 Replies
- 4199 Views
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Last post by stephanehess
02 Feb 2023, 15:33
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- 5 Replies
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02 Feb 2023, 14:14
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Last post by stephanehess
02 Feb 2023, 13:39
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Nested logit model, with one nest as an ordered nest
by Abouelela » 21 Dec 2022, 14:39 » in Model specification - 1 Replies
- 20 Views
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Last post by stephanehess
02 Feb 2023, 13:31
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Convert mlogit data format into apollo data format
by LucaN » 24 Dec 2022, 11:33 » in Data preparation, processing and pre-estimation analysis - 1 Replies
- 25 Views
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Last post by stephanehess
02 Feb 2023, 13:23
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Aapollo_saveOutput: Error in paste0(rep(...
by psalazar » 14 Dec 2022, 10:35 » in Errors during model validation and/or estimation. - 1 Replies
- 16 Views
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Last post by stephanehess
02 Feb 2023, 13:20
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More efficient way of doing a step-wise approach?
by victornielsen » 14 Dec 2022, 17:21 » in Model specification - 1 Replies
- 14 Views
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Last post by stephanehess
02 Feb 2023, 13:13
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Confidence intervals of aggregate market shares
by LucaN » 12 Dec 2022, 17:52 » in Post-estimation analysis/use of results - 1 Replies
- 8 Views
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Last post by stephanehess
02 Feb 2023, 13:12
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- 1 Replies
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02 Feb 2023, 13:00
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- 1 Replies
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Last post by stephanehess
02 Feb 2023, 12:58
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From most likely value to characteristics across classes
by LianEnaLiu » 05 Jan 2023, 10:58 » in Post-estimation analysis/use of results - 1 Replies
- 11 Views
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Last post by stephanehess
02 Feb 2023, 12:30
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- 1 Replies
- 9 Views
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Last post by stephanehess
02 Feb 2023, 11:29
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huge difference between results from a WTP-space and Preference-space model
by arohamirai » 31 Dec 2022, 15:13 » in Estimation results - 3 Replies
- 62 Views
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Last post by stephanehess
02 Feb 2023, 11:15
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- 1 Replies
- 22 Views
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02 Feb 2023, 11:12
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- 61 Views
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Last post by stephanehess
02 Feb 2023, 11:07
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Position-specific constants for best vs worst choices
by jayb » 31 Jan 2023, 16:43 » in Model specification - 1 Replies
- 8 Views
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Last post by stephanehess
02 Feb 2023, 10:48
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