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 6 matches
- 07 Jul 2021, 15:13
- Forum: Models and estimation
- Topic: interpretation of ICLV model estimates
- Replies: 4
- Views: 6926
Re: interpretation of ICLV model estimates
Thank you for your guidance in the right direction.
- 05 Jul 2021, 22:56
- Forum: Models and estimation
- Topic: interpretation of ICLV model estimates
- Replies: 4
- Views: 6926
interpretation of ICLV model estimates
Hello, I am a beginner in choice modeling and I have created my first ICLV model (by looking at examples on the apollo website) but I am not sure how do I interpret the results. Below are my model and estimates. apollo_beta = c(b_walk = 0, b_bicycle = 0, b_public_trans = 0, b_car = 0, b_dist_walk = ...
- 18 Jun 2021, 11:51
- Forum: Model specification
- Topic: need to define utilities for categorical variables in MNL model
- Replies: 9
- Views: 9300
Re: need to define utilities for categorical variables in MNL model
OKay, understood. Thank you for the answer.
- 15 Jun 2021, 21:45
- Forum: Model specification
- Topic: need to define utilities for categorical variables in MNL model
- Replies: 9
- Views: 9300
Re: need to define utilities for categorical variables in MNL model
Hello Stephane, I have a very general question to ask while implementing interaction of characteristics, how can we decide with the variables? Shall we check the correlation between variables and then create an interaction model with highly correlated features? For example, We took the interaction o...
- 06 Jun 2021, 21:25
- Forum: Model specification
- Topic: need to define utilities for categorical variables in MNL model
- Replies: 9
- Views: 9300
Re: need to define utilities for categorical variables in MNL model
Thank you for the reply, Stephane.
It is working as expected.
It is working as expected.
- 05 Jun 2021, 13:57
- Forum: Model specification
- Topic: need to define utilities for categorical variables in MNL model
- Replies: 9
- Views: 9300
need to define utilities for categorical variables in MNL model
Hello, I am very new to choice modeling and r coding. I am working on vehicle mode choice analysis. I have 4 alternatives namely 1. Car 2. Walk 3. Bicycle 4. Public Transport I have a variable called "motive" in my data set, which states the trip taken. "motive" variable has 4 va...