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.
- 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.
Errors during model validation and/or estimation.
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- 2 Replies
- 92 Views
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Last post by anenor
13 May 2022, 08:22
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All observations have zero probability at starting value for model component
by billyuoft » 06 May 2022, 19:46 - 6 Replies
- 222 Views
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Last post by billyuoft
12 May 2022, 16:59
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- 1 Replies
- 62 Views
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Last post by dpalma
12 May 2022, 16:49
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MDCEV model estimation - Budget not as a vector the same size as observation error
by billyuoft » 05 May 2022, 21:15 - 1 Replies
- 96 Views
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Last post by stephanehess
06 May 2022, 19:53
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- 1 Replies
- 165 Views
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Last post by dpalma
29 Apr 2022, 21:32
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- 4 Replies
- 560 Views
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Last post by Yashin
29 Apr 2022, 01:14
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- 3 Replies
- 281 Views
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Last post by stephanehess
26 Apr 2022, 23:19
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Errors during model estimation for latent class analysis using Apollo Package
by eunkum » 11 Apr 2022, 23:44 - 1 Replies
- 248 Views
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Last post by stephanehess
15 Apr 2022, 11:07
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- 1 Replies
- 166 Views
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Last post by stephanehess
15 Apr 2022, 11:03
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- 1 Replies
- 291 Views
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Last post by stephanehess
04 Apr 2022, 17:22
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- 1 Replies
- 547 Views
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Last post by stephanehess
09 Mar 2022, 12:47
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- 1 Replies
- 752 Views
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Last post by stephanehess
03 Feb 2022, 22:31
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- 1 Replies
- 752 Views
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Last post by stephanehess
18 Jan 2022, 10:23
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- 30 Replies
- 20997 Views
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Last post by stephanehess
18 Jan 2022, 08:16
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- 4 Replies
- 1165 Views
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Last post by Sutsch
14 Jan 2022, 23:55
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- 1 Replies
- 711 Views
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Last post by stephanehess
12 Jan 2022, 16:11
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- 2 Replies
- 877 Views
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Last post by stephanehess
06 Jan 2022, 07:20
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- 1 Replies
- 767 Views
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Last post by stephanehess
05 Jan 2022, 09:04
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"Paramter does not influence the log-likelihood of your model" after included LV
by Boris » 13 Dec 2021, 15:51 - 7 Replies
- 1916 Views
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Last post by Boris
03 Jan 2022, 10:24
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- 4 Replies
- 1353 Views
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Last post by stephanehess
16 Dec 2021, 12:00
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- 0 Replies
- 735 Views
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Last post by MPFMAS001
16 Dec 2021, 09:30
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apollo_validateInputs() and apollo_insertScaling() handle symbols differently?
by sensoryscientist » 21 Oct 2021, 19:45 - 3 Replies
- 2265 Views
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Last post by dpalma
30 Nov 2021, 18:33
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- 2 Replies
- 3048 Views
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Last post by yukiyama
19 Nov 2021, 02:38
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- 2 Replies
- 2015 Views
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Last post by stephanehess
20 Oct 2021, 17:26
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Error in model estimation for LC model with class allocation and covariates
by dasham » 11 Oct 2021, 08:51 - 3 Replies
- 2269 Views
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Last post by stephanehess
20 Oct 2021, 13:35
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