> rm(list=ls())
> library(apollo)
>
> netherlands <- read.delim("netherlands.dat")
> netherlands$mode <- as.factor(netherlands$choice)
> levels(netherlands$mode) <- c("car", "rail", "car", "rail")
> netherlands$idx.alt <- as.numeric(netherlands$mode)
> levels(netherlands$idx.alt) <- c(car=1, rail=2 ...
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. We check the forum at least twice a week. It may thus take a couple of days for your post to appear and before we reply. There is no need to submit the post multiple times.
Search found 5 matches
- 12 Aug 2020, 11:59
- Forum: Errors during model validation and/or estimation.
- Topic: error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!"
- Replies: 5
- Views: 15868
- 11 Aug 2020, 18:45
- Forum: Errors during model validation and/or estimation.
- Topic: error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!"
- Replies: 5
- Views: 15868
Re: error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!"
Hi Stephane,
I changed my utility functions to:
V[['rail']] <- b0_rail + b1_cost*cost_rail + b2_time*(ivtt_rail +rpovt_rail)
V[['car']] <- b1_cost*cost_car + b2_time*(ivtt_car + rpovt_car)
But I get the same problem. What am I doing wrong now? I simply can't find my mistake.
I am sorry for ...
I changed my utility functions to:
V[['rail']] <- b0_rail + b1_cost*cost_rail + b2_time*(ivtt_rail +rpovt_rail)
V[['car']] <- b1_cost*cost_car + b2_time*(ivtt_car + rpovt_car)
But I get the same problem. What am I doing wrong now? I simply can't find my mistake.
I am sorry for ...
- 04 Aug 2020, 13:20
- Forum: Errors during model validation and/or estimation.
- Topic: error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!"
- Replies: 5
- Views: 15868
error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!"
Hi,
when using the Apollo package to estimate a binary choice model I get the error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!" I have checked my code and looked into a few forums to try and find where my mistake is but I can't seem to find ...
when using the Apollo package to estimate a binary choice model I get the error: "apollo_estimate(apollo_beta, apollo_fixed, apollo_probabilities, : Not proceeding with estimation!" I have checked my code and looked into a few forums to try and find where my mistake is but I can't seem to find ...
- 03 Aug 2020, 09:27
- Forum: Model specification
- Topic: Log-transformation with a piecewise linearization
- Replies: 4
- Views: 12716
Re: Log-transformation with a piecewise linearization
Hi Stephane,
I have to make a piecewise linearization of the age variable with the specification of splitting the age into four parts (0-15, 16-30; 31-45 and the 45 until the end). My discrete utility functions for the binary model are in the picture attached.
Is that all the information you need ...
I have to make a piecewise linearization of the age variable with the specification of splitting the age into four parts (0-15, 16-30; 31-45 and the 45 until the end). My discrete utility functions for the binary model are in the picture attached.
Is that all the information you need ...
- 31 Jul 2020, 21:27
- Forum: Model specification
- Topic: Log-transformation with a piecewise linearization
- Replies: 4
- Views: 12716
Log-transformation with a piecewise linearization
Hi there,
I am a very new user of Apollo and eventhough I have worked with R before I am still having some diffculties. For a project I have to estimate a binary choice model and then later perform different specifications to the model. One specification of my binary model is a log-transformation ...
I am a very new user of Apollo and eventhough I have worked with R before I am still having some diffculties. For a project I have to estimate a binary choice model and then later perform different specifications to the model. One specification of my binary model is a log-transformation ...