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
- 22 Nov 2023, 22:54
- Forum: Installation and updating
- Topic: Apollo not properly loading (I believe)
- Replies: 1
- Views: 33180
Apollo not properly loading (I believe)
Hi I use r 4.3.2. on RStudio I installed apollo 0.3.1, and 0.2.9. After running library(apollo), it is loaded but with the next message: > library(apollo) . ,, , ,, ,,,,,, , ,, , ,, , ,,,,. ,, , ,, ,,,,,, ,,, // // , ,,,. ,,,,,. ,, //// // // ,, ,,,,,. ,, // // ////// ///// // // ///// ,,, ,, , // /...
- 22 Nov 2022, 19:56
- Forum: Model specification
- Topic: HCM model with casulity between latent factors
- Replies: 6
- Views: 5745
Re: HCM model with casulity between latent factors
Hi all I see that risk, control, and pro, all are parameters in the Utility function, i.e.: ... + lambda_risk_nonphy * LV_risk + lambda_control_nonphy * LV_control + lambda_pro_nonphy * LV_pro) But, then, you would be including direct and indirect effects of risk and control over the utility... How ...
- 22 Nov 2022, 19:39
- Forum: Model specification
- Topic: Exogenous LV effect on endogenous LV
- Replies: 1
- Views: 1393
Exogenous LV effect on endogenous LV
Hi all. Hope you are doing well. In a typical SEM, you could use an LV as a regressor or independent variable of another LV. I am wondering if in an ICLV this is possible. Can you use an LV as an independent variable of another LV that influences the choice? If so, how would you write it? I understa...
- 18 Feb 2021, 17:38
- Forum: Feature requests
- Topic: Spatial autocorrelations within choice model
- Replies: 4
- Views: 11331
Spatial autocorrelations within choice model
Hi! I would like to ask if someone has developed a choice model including spatial autocorrelation and if so, could you share your code. Thank you!