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  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
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    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
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by Nishihara
19 Jun 2023, 02:45
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Re: Unreasonable estimate for cost

Dear Professor,

I am very grateful for your help and will further look at the data.

Best regards
by Nishihara
18 Jun 2023, 09:03
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Re: Unreasonable estimate for cost

Dear Professor, Thank you very much for your prompt reply. Now I understand the problem. May I ask if I have results with positive values of cost estimate from MNL, what should I do with the analysis? Does it mean that the data is problematic and the analysis is undoable? Thank you very much for you...
by Nishihara
18 Jun 2023, 08:38
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Re: Unreasonable estimate for cost

Dear Professor, Thank you very much for your help. It did work after I update to R4.3.1 and no error came out. However, through MNL, the estimate for the cost is positive but the value is reasonable. I attached the code and results below. Do you think there is a connection between the unreasonable e...
by Nishihara
16 Jun 2023, 03:12
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Re: Unreasonable estimate for cost

Dear Professor,

Thank you very much for your help.

No, I did not get any error before apollo_estimate, and I am using the latest version of 0.2.9.
by Nishihara
13 Jun 2023, 02:25
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Re: Unreasonable estimate for cost

Dear Professor, Thank you very much for your reply. I tried to do the estimation through MNL but come out this error when I run the apollo_estimate: "Error in apollo_probabilities(apollo_beta, apollo_inputs, functionality = "validate") : object '"validate"' not found". ...
by Nishihara
09 Jun 2023, 07:15
Forum: Estimation results
Topic: Unreasonable estimate for cost
Replies: 10
Views: 9245

Unreasonable estimate for cost

Dear Sir, I am running a mixed logit model and getting a very unreasonable estimate for the log-normalized cost: -1066.11898 Please see the code and results. I cannot figure out what is the issue here because I already run the similar codes with different variable names in different datasets (same p...
by Nishihara
03 Jun 2023, 03:36
Forum: Errors during model validation and/or estimation.
Topic: Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control
Replies: 5
Views: 4768

Re: Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control

Dear David,

Thank you very much for your kind help.

Best wishes,
Jie
by Nishihara
22 May 2023, 14:31
Forum: Errors during model validation and/or estimation.
Topic: Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control
Replies: 5
Views: 4768

Re: Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control

Hi David, Thank you very much for your help and suggestions. The model worked after I excluded coefficients with L0 in each attribute, but still got the same error when I tried to add workInLogs=TRUE. Since there is no more NaN in standard error, I do not add this in the pollo_control. However, I ha...
by Nishihara
20 May 2023, 07:46
Forum: Errors during model validation and/or estimation.
Topic: Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control
Replies: 5
Views: 4768

Error in if (!test) { : missing value where TRUE/FALSE needed when adding workInLogs=TRUE in apollo_control

Dear Professor, I have been keeping having NaN for Standard Errors, so I am trying to add workInLogs=TRUE in apollo_control to see if the issue can be solved. However, once I add workInLogs=TRUE in apollo_control, I got the error "Error in if (!test) { : missing value where TRUE/FALSE needed&qu...

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