Hi
I am trying to do a route choice model. The data is not surveyed data but synthesized. The routes were generated based on directness measure assuming a unit demand. There were a total of 22 routes generated and the generated data were then grouped into 10 alternatives based on the normalized cdf ...
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
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- Check that the same issue has not already been addressed in the forum - there is a search tool.
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- 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
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Search found 5 matches
- 29 Jul 2025, 13:13
- Forum: Estimation results
- Topic: negative rho values
- Replies: 1
- Views: 35285
- 04 Mar 2024, 05:51
- Forum: Model estimation
- Topic: converting the travel times as travel time cost by multiplying with wage rate
- Replies: 1
- Views: 30892
converting the travel times as travel time cost by multiplying with wage rate
Hi
I am trying to enter the utility function such that I multiply the wage rate with the travel time to get the travel time cost. Do i enter the wage rate as a socioeconomic variable ? if i enter it as a socioeconomic variable such that the utility is of the form
b_t1=cc+b_t*(WR)
V[['car']] = asc ...
I am trying to enter the utility function such that I multiply the wage rate with the travel time to get the travel time cost. Do i enter the wage rate as a socioeconomic variable ? if i enter it as a socioeconomic variable such that the utility is of the form
b_t1=cc+b_t*(WR)
V[['car']] = asc ...
- 06 Apr 2023, 12:31
- Forum: Errors during model validation and/or estimation.
- Topic: output changed after optimisation
- Replies: 9
- Views: 80425
Re: output changed after optimisation
Hi
Kindly find attached the code
# ####################################################### #
#### 1. Definition of core settings
# ####################################################### #
### Clear memory
rm(list = ls())
### Load libraries
library(apollo)
#> Apollo 0.2.8
#> http://www ...
Kindly find attached the code
# ####################################################### #
#### 1. Definition of core settings
# ####################################################### #
### Clear memory
rm(list = ls())
### Load libraries
library(apollo)
#> Apollo 0.2.8
#> http://www ...
- 30 Mar 2023, 13:04
- Forum: Errors during model validation and/or estimation.
- Topic: output changed after optimisation
- Replies: 9
- Views: 80425
output changed after optimisation
hi
i have got the following output,
The output of 'apollo_probabilities' has changed after the optimisation of the code carried out by Apollo. This indicates a problem, and
the unoptimised and unscaled version will be used instead. Please contact the developers for assistance!
kindly help on the ...
i have got the following output,
The output of 'apollo_probabilities' has changed after the optimisation of the code carried out by Apollo. This indicates a problem, and
the unoptimised and unscaled version will be used instead. Please contact the developers for assistance!
kindly help on the ...
- 16 Mar 2023, 12:12
- Forum: Errors during model validation and/or estimation.
- Topic: Error in apollo_probabilities(apollo_beta_shifted, apollo_inputs) : object 'v' not found
- Replies: 1
- Views: 6597
Error in apollo_probabilities(apollo_beta_shifted, apollo_inputs) : object 'v' not found
Hi
Kindly help me with the following error
Error in apollo_probabilities(apollo_beta_shifted, apollo_inputs) :
object 'v' not found
i have specified v in my model. the code is as follows:
# ####################################################### #
#### 1. Definition of core settings ...
Kindly help me with the following error
Error in apollo_probabilities(apollo_beta_shifted, apollo_inputs) :
object 'v' not found
i have specified v in my model. the code is as follows:
# ####################################################### #
#### 1. Definition of core settings ...