Biogeme

1–30 of 965

Welcome to the users group for Biogeme. Submit your questions, comments, suggestions. Please take the time as well to respond to other users questions.

0 selected

Yuri Groeneveld, Bierlaire Michel2

Jan 26

The contribution to the loglikelihood is the log of the probability, given by lognested. “nested” (

unread,

The contribution to the loglikelihood is the log of the probability, given by lognested. “nested” (

Jan 26

Jan 25

Question about model specification of latent variable model

Dear Prof. Bierlaire, Thank you for answering my former question. My problem was successfully solved

unread,

Question about model specification of latent variable model

Dear Prof. Bierlaire, Thank you for answering my former question. My problem was successfully solved

Jan 25

Jan 25

Categorical Data

Hi Everyone, I have conducted a survey containing categories such as age, income level, etc. The

unread,

Categorical Data

Hi Everyone, I have conducted a survey containing categories such as age, income level, etc. The

Jan 25

Yuri Groeneveld, Bierlaire Michel4

Jan 19

Thanks. When I try nesting with the different modes, car and pt are 1 when constrained to 1 and bike

unread,

Thanks. When I try nesting with the different modes, car and pt are 1 when constrained to 1 and bike

Jan 19

Ali Karami, Bierlaire Michel2

Jan 16

extreme value type I

Gumbel distribution en.wikipedia.org On 16 Jan 2023, at 19:03, Ali Karami <alikarami.kntu@gmail.

unread,

extreme value type I

Gumbel distribution en.wikipedia.org On 16 Jan 2023, at 19:03, Ali Karami <alikarami.kntu@gmail.

Jan 16

sasan esfandiari, Fabiana Peixoto de Mello2

Jan 16

Hi, You have to post code in a readable format, exactly like it visually is in your code editor,

unread,

Hi, You have to post code in a readable format, exactly like it visually is in your code editor,

Jan 16

Uthpalee Hewage, … Fabiana Peixoto de Mello5

Jan 16

introduction to PandasBiogeme

If you do not post your entire code in readable form - visually as it shows in your code editor - it

unread,

introduction to PandasBiogeme

If you do not post your entire code in readable form - visually as it shows in your code editor - it

Jan 16

linlin zhang, Bierlaire Michel2

Jan 16

inquire if the CNL nest structure is valid

I suggest to constrain the alpha1 to 1. On 16 Jan 2023, at 15:50, linlin zhang <linlinzhang95@

unread,

inquire if the CNL nest structure is valid

I suggest to constrain the alpha1 to 1. On 16 Jan 2023, at 15:50, linlin zhang <linlinzhang95@

Jan 16

Ahmad Reshad Ansar, Bierlaire Michel2

Jan 16

Errors while running model

You probably have an old version of 01logit.py. There is no “headers” in the file. biogeme/01logit.py

unread,

Errors while running model

You probably have an old version of 01logit.py. There is no “headers” in the file. biogeme/01logit.py

Jan 16

ilham huseynov, Fabiana Peixoto de Mello2

Jan 16

import biogeme.database as db

You can find the answer in Stack Overflow. It is a problem related to the version of numpy. python -

unread,

import biogeme.database as db

You can find the answer in Stack Overflow. It is a problem related to the version of numpy. python -

Jan 16

Jan 13

import biogeme database

I am using Biogeme 3.2.10 I am having such error while importing. import pandas as pd import biogeme

unread,

import biogeme database

I am using Biogeme 3.2.10 I am having such error while importing. import pandas as pd import biogeme

Jan 13

Karine Xu, Bierlaire Michel2

Jan 13

A question about conditional logit model estimation in Biogeme

Then, Biogeme is using the “wide” format: one row per observation. And, yes, you can include sociio-

unread,

A question about conditional logit model estimation in Biogeme

Then, Biogeme is using the “wide” format: one row per observation. And, yes, you can include sociio-

Jan 13

Jan 12

Error while running import biogeme . database as db Thank you for any assistance

unread,

Error while running import biogeme . database as db Thank you for any assistance

Jan 12

Tom Eagle, Bierlaire Michel3

Jan 10

Utility function getting too long

Thank you. I'll study up on bioMultSum Tom On Jan 8, 2023, at 12:59 PM, Bierlaire Michel <

unread,

Utility function getting too long

Thank you. I'll study up on bioMultSum Tom On Jan 8, 2023, at 12:59 PM, Bierlaire Michel <

Jan 10

Yuri Groeneveld, Bierlaire Michel4

Jan 9

Dear prof. Bierlaire, I tried to implement a CNL but Biogeme wasn't finished after 72 hours. Even

unread,

Dear prof. Bierlaire, I tried to implement a CNL but Biogeme wasn't finished after 72 hours. Even

Jan 9

toni zhang, … Bierlaire Michel4

Jan 8

import des modules

Et comme cela ? conda create -n newenv python=3.9 conda activate newenv pip install pandas scipy tqdm

unread,

import des modules

Et comme cela ? conda create -n newenv python=3.9 conda activate newenv pip install pandas scipy tqdm

Jan 8

Fabiana Peixoto de Mello

12/31/22

ImportError: cannot import name 'database' from 'scenarios'

I am using Biogeme 3.10. I am getting this error while trying to import scenarios. from scenarios

unread,

ImportError: cannot import name 'database' from 'scenarios'

I am using Biogeme 3.10. I am getting this error while trying to import scenarios. from scenarios

12/31/22

Ahmet Heperkan, Bierlaire Michel2

12/28/22

Beta is not defined error

You forgot to import the expressions; from biogeme.expressions import Beta On 23 Dec 2022, at 16:27,

unread,

Beta is not defined error

You forgot to import the expressions; from biogeme.expressions import Beta On 23 Dec 2022, at 16:27,

12/28/22

oz zalel, … Tom Eagle14

12/20/22

ImportError: DLL load failed while importing cythonbiogeme: The specified module could not be found.

I screwed up the directory to put libwinpthread-1.dll in. it should go in your main Python directory.

unread,

ImportError: DLL load failed while importing cythonbiogeme: The specified module could not be found.

I screwed up the directory to put libwinpthread-1.dll in. it should go in your main Python directory.

12/20/22

12/16/22

ICLV with mixed logit and panel effect

Hi Michel, I'm trying to estimate an ICLV, combing with panel effect and whose core model

unread,

ICLV with mixed logit and panel effect

Hi Michel, I'm trying to estimate an ICLV, combing with panel effect and whose core model

12/16/22

Gautham Bharathi, … Matthew Wigginton Bhagat-Conway3

12/16/22

running a 400GB matrix through the biogeme package

This sounds like a memory issue to me. I wasn't using biogeme but I worked with a similarly-sized

unread,

running a 400GB matrix through the biogeme package

This sounds like a memory issue to me. I wasn't using biogeme but I worked with a similarly-sized

12/16/22

12/14/22

Fitting a maxdiff model in biogeme

Has anyone fit a MaxDiff model in Biogeme? Think of it as a fixed set size of a forced choice as best

unread,

Fitting a maxdiff model in biogeme

Has anyone fit a MaxDiff model in Biogeme? Think of it as a fixed set size of a forced choice as best

12/14/22

Bastian Arnaiz Castillo, Bierlaire Michel3

12/14/22

Thanks! That was the solution, it helped me a lot. El miércoles, 14 de diciembre de 2022 a las 10:37:

unread,

Thanks! That was the solution, it helped me a lot. El miércoles, 14 de diciembre de 2022 a las 10:37:

12/14/22

Mariana Sousa, Bierlaire Michel2

12/12/22

Nested logit model and WTP

You probably have an identification issue. In general, if an alternative has no label, it is not

unread,

Nested logit model and WTP

You probably have an identification issue. In general, if an alternative has no label, it is not

12/12/22

m.sam...@gmail.com, Bierlaire Michel2

12/6/22

Strange. Try to uninstall first. On 6 Dec 2022, at 16:23, m.sam...@gmail.com <m.sam...@gmail.com

unread,

Strange. Try to uninstall first. On 6 Dec 2022, at 16:23, m.sam...@gmail.com <m.sam...@gmail.com

12/6/22

linlin zhang, Bierlaire Michel5

12/2/22

Inquire if MNL is necessary when estimating NL model

Dear Michael, Thank you for your answer. 1. However, I am quite confused why you refer to the

unread,

Inquire if MNL is necessary when estimating NL model

Dear Michael, Thank you for your answer. 1. However, I am quite confused why you refer to the

12/2/22

Zhe Ji, Bierlaire Michel2

12/1/22

Try to run the example indicators model in 07cross_elasticities.py

On 1 Dec 2022, at 02:09, Zhe Ji <ernes...@gmail.com> wrote: Dear Professor Bierlaire, I tried

unread,

Try to run the example indicators model in 07cross_elasticities.py

On 1 Dec 2022, at 02:09, Zhe Ji <ernes...@gmail.com> wrote: Dear Professor Bierlaire, I tried

12/1/22

Mariana Ss, Bierlaire Michel3

12/1/22

Mixed logit model with aggregate panel data

Dear Professor Bierlaire, My dataset tracks sales of different products over a quarter. So I want to

unread,

Mixed logit model with aggregate panel data

Dear Professor Bierlaire, My dataset tracks sales of different products over a quarter. So I want to

12/1/22

azis hakim, Bierlaire Michel3

11/28/22

Error Resul Full Latent Choice Model

It looks like a specification issue. Did you check the eigenvector analysis at the end of the HTML

unread,

Error Resul Full Latent Choice Model

It looks like a specification issue. Did you check the eigenvector analysis at the end of the HTML

11/28/22

reza fallahpour

11/27/22

latent class model

Dear Professor Bierlaire, I couldn't find any documentation about a latent class model using

unread,

latent class model

Dear Professor Bierlaire, I couldn't find any documentation about a latent class model using

11/27/22

Search

Clear search

Close search

Google apps

Main menu