Dear Dr. Palma,
I did not notice the spelling mistake.
It worked well after I corrected the spelling mistake.
Thank you.
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
- 27 Nov 2022, 15:47
- Forum: Model estimation
- Topic: Constraints do not work
- Replies: 2
- Views: 5518
- 05 Oct 2022, 17:53
- Forum: Model estimation
- Topic: Constraints do not work
- Replies: 2
- Views: 5518
Constraints do not work
Hi, I ran the following code using my own survey data. I got the negative alpha -0.355207 even though I set the constraints c("alpha >= 0","alpha < 1"). It would be appreciated if you could tell me how to limit the sign of alpha to positive. library(apollo) apollo_initialise() ap...
- 19 May 2022, 05:53
- Forum: Errors during model validation and/or estimation.
- Topic: Error in bootstrapSE
- Replies: 6
- Views: 5530
Re: Error in bootstrapSE
Dear Dr. Palma,
I successfully got bootstrap standard errors by v0.2.8 that I downloaded from your link.
Thank you.
I successfully got bootstrap standard errors by v0.2.8 that I downloaded from your link.
Thank you.
- 03 May 2022, 07:09
- Forum: Examples (existing and requests for new ones)
- Topic: HB_MMNL does not run
- Replies: 2
- Views: 4779
Re: HB_MMNL does not run
Dear Prof. Hess,
Thank you for answering my question.
As you pointed out, I ran the whole file in one go by using RStudio.
It worked well when I followed your advice.
Thank you for answering my question.
As you pointed out, I ran the whole file in one go by using RStudio.
It worked well when I followed your advice.
- 01 May 2022, 17:41
- Forum: Examples (existing and requests for new ones)
- Topic: HB_MMNL does not run
- Replies: 2
- Views: 4779
HB_MMNL does not run
Hello, I tried to run HB_MMNL in Example Files, but I got the following error message. Could you tell me what is wrong? > # ################################################################# # > #### LOAD LIBRARY AND DEFINE CORE SETTINGS #### > # ######################################################...
- 29 Apr 2022, 09:08
- Forum: Errors during model validation and/or estimation.
- Topic: Error in bootstrapSE
- Replies: 6
- Views: 5530
Error in bootstrapSE
Hello, I modified "LC_with_covariates" in Example Files and tried to estimate bootstrap standard errors. However, I got the following error message: Error in apollo_preprocess(inputs = mnl_settings, modelType, functionality, : Each element of "utilities" for model component "...