Important: Read this before posting to this forum

  1. 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.
  2. 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
  3. Before asking a question on the forum, users are kindly requested to follow these steps:
    1. Check that the same issue has not already been addressed in the forum - there is a search tool.
    2. 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
    3. Check the frequently asked questions section on the Apollo website, which discusses some common issues/failures. Please see http://www.apollochoicemodelling.com/faq.html
    4. Make sure that R is using the latest official release of Apollo.
  4. If the above steps do not resolve the issue, then users should follow these steps when posting a question:
    1. provide full details on the issue, including the entire code and output, including any error messages
    2. 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 2 matches

by richardqiu
25 Jan 2022, 03:28
Forum: Bug reports
Topic: Error with apollo_prediction
Replies: 3
Views: 8837

Re: Error with apollo_prediction

Thank you for your reply and confirmation, Prof Hess! Apollo is really a fantastic tool for us choice modelers.
Best,
Richard
by richardqiu
21 Jan 2022, 16:38
Forum: Bug reports
Topic: Error with apollo_prediction
Replies: 3
Views: 8837

Error with apollo_prediction

Dear Prof Hess, I am using Apollo v0.2.6 and working on the prediction of a LC model. I've received the following error message when using the apollo_prediction function. Error in if (is.matrix(P[[j]][[k]]) & ncol(P[[j]][[k]]) == nInter) P[[j]][[k]] = rowMeans(P[[j]][[k]]) : argument is of lengt...