Biogeme

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

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Luiza Stoffel, … Siti Fadilah8

Sep 21

Dear Prof. Bierlaire, Finally, it works! Thank you for providing the solution. Best regards, Siti On

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Dear Prof. Bierlaire, Finally, it works! Thank you for providing the solution. Best regards, Siti On

Sep 21

linlin zhang, Bierlaire Michel3

Sep 20

< Warning > Numerical problem with the second derivative matrix

Hi Michel, I am wondering if this warning is because I used a small Random Sample (500/5000) to run

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< Warning > Numerical problem with the second derivative matrix

Hi Michel, I am wondering if this warning is because I used a small Random Sample (500/5000) to run

Sep 20

Sep 12

Questions about data types

Dear professors and biogeme users, I turned to Biogeme from Nlogit just recently. However, the

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Questions about data types

Dear professors and biogeme users, I turned to Biogeme from Nlogit just recently. However, the

Sep 12

oz zalel, … Gerben7

Sep 11

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

Hi Michel and others, We were having similar problems with Python 3.10 and Biogeme 3.2.10. For what

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

Hi Michel and others, We were having similar problems with Python 3.10 and Biogeme 3.2.10. For what

Sep 11

Bart Jourquin, Bierlaire Michel4

Sep 6

Constraints on estimators seem to produce unexpected results

Are the values of the log-likelihood comparable? If so, it means that the likelihood function is

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Constraints on estimators seem to produce unexpected results

Are the values of the log-likelihood comparable? If so, it means that the likelihood function is

Sep 6

Andy, Bierlaire Michel2

Sep 5

the second derivatives is close to singularity

On 5 Sep 2022, at 06:29, Andy <fadhlullah.apriandy@gmail.com> wrote: Hello Professor Bierlaire,

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the second derivatives is close to singularity

On 5 Sep 2022, at 06:29, Andy <fadhlullah.apriandy@gmail.com> wrote: Hello Professor Bierlaire,

Sep 5

linlin zhang, Bierlaire Michel3

Sep 3

initial value form file . iter

Many thanks! 在2022年8月28日星期日 UTC+2 19:24:23<michel.b...@epfl.ch> 写道： It is just a warning.

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initial value form file . iter

Many thanks! 在2022年8月28日星期日 UTC+2 19:24:23<michel.b...@epfl.ch> 写道： It is just a warning.

Sep 3

Bart Jourquin, Bierlaire Michel2

Sep 1

exp() versus e** in utility function

How different? In the calculation of derivatives, the operator ** is more complex numerically than

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exp() versus e** in utility function

How different? In the calculation of derivatives, the operator ** is more complex numerically than

Sep 1

linlin zhang, Bierlaire Michel2

Sep 1

How to shrink the number of iterations or stop iterating

On 31 Aug 2022, at 16:41, linlin zhang <linlinzhang95@gmail.com> wrote: Dear Michel, I am using

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How to shrink the number of iterations or stop iterating

On 31 Aug 2022, at 16:41, linlin zhang <linlinzhang95@gmail.com> wrote: Dear Michel, I am using

Sep 1

Tiago Filipe Florentino Chaves Dias, Bierlaire Michel2

Sep 1

On 31 Aug 2022, at 20:07, tiagoffcd97@gmail.com wrote: Thank you for the clarification. I have

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On 31 Aug 2022, at 20:07, tiagoffcd97@gmail.com wrote: Thank you for the clarification. I have

Sep 1

linlin zhang, Bierlaire Michel4

Aug 27

AttributeError: 'list' object has no attribute 'items'

Dear Michel, Thanks! I have solved this problem! Best, Lin 在2022年8月27日星期六 UTC+2 12:24:02<michel.b.

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AttributeError: 'list' object has no attribute 'items'

Dear Michel, Thanks! I have solved this problem! Best, Lin 在2022年8月27日星期六 UTC+2 12:24:02<michel.b.

Aug 27

Spencer Aeschliman, Bierlaire Michel3

Aug 27

Sequential LV model specification + strange error message

That's what I thought re: the latent variable. Thank you! I actually am now realizing my utility

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Sequential LV model specification + strange error message

That's what I thought re: the latent variable. Thank you! I actually am now realizing my utility

Aug 27

Bierlaire Michel, ASINDU MARSY5

Aug 25

Re: Biogeme support

Dear Prof Michel, I very much appreciate the constant support you have offered me while I try to fit

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Re: Biogeme support

Dear Prof Michel, I very much appreciate the constant support you have offered me while I try to fit

Aug 25

Yoshiki Fujikawa

Aug 25

biogeme 3.2.10 ValueError

I got another error... After installing biogeme3.2.10 and executing "import biogeme.database

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biogeme 3.2.10 ValueError

I got another error... After installing biogeme3.2.10 and executing "import biogeme.database

Aug 25

Fani Hatziioannidu

Aug 23

MNL model with frequencies

Dear Group and dear Professor, I am working on this MNL model for the past couple of months. I have a

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MNL model with frequencies

Dear Group and dear Professor, I am working on this MNL model for the past couple of months. I have a

Aug 23

Yoshiki Fujikawa

Aug 23

biogeme3.2.9 ImportError

After installing biogeme3.2.9 and executing "import biogeme.database", the following error

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biogeme3.2.9 ImportError

After installing biogeme3.2.9 and executing "import biogeme.database", the following error

Aug 23

Jingzhu Shan, Bierlaire Michel2

Aug 22

LC model with weighted panel data

- The models for the two classes look identical. Therefore, it is quite difficult for an algorithm to

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LC model with weighted panel data

- The models for the two classes look identical. Therefore, it is quite difficult for an algorithm to

Aug 22

amirbrd, Bierlaire Michel2

Aug 19

Output for multiple models

This is implemented in the upcoming version. The code is already available on github. https://github.

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Output for multiple models

This is implemented in the upcoming version. The code is already available on github. https://github.

Aug 19

Aug 19

Specification of membership model

Dear Prof. Bierlaire, I am running a latent class model with two classes and includes a membership

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Specification of membership model

Dear Prof. Bierlaire, I am running a latent class model with two classes and includes a membership

Aug 19

Ardeshir kohandel shirazi

Aug 13

Interpretation of ML and MNL models

Dear Prof. Bierlaire, My name is Ardeshir and I have a master's degree in traffic and

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Interpretation of ML and MNL models

Dear Prof. Bierlaire, My name is Ardeshir and I have a master's degree in traffic and

Aug 13

Ardeshir kohandel shirazi

Aug 11

choice modelling

Hello, My name is Ardeshir and I have a master's degree in traffic and transportation engineering

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choice modelling

Hello, My name is Ardeshir and I have a master's degree in traffic and transportation engineering

Aug 11

Louis Henri Furtado, Bierlaire Michel2

Aug 11

Willingness to pay (Delta Methodology) + elasticities - Mixed logit models

On 10 Aug 2022, at 13:32, Louis Henri Furtado <tornadolouis.f@gmail.com> wrote: Dear Prof.

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Willingness to pay (Delta Methodology) + elasticities - Mixed logit models

On 10 Aug 2022, at 13:32, Louis Henri Furtado <tornadolouis.f@gmail.com> wrote: Dear Prof.

Aug 11

Bierlaire Michel

Aug 11

Re: request for assistance - NL

On 11 Aug 2022, at 02:38, Taghavi, Mehdi <Mehdi.Taghavi@jacobs.com> wrote: Hello Professor

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Re: request for assistance - NL

On 11 Aug 2022, at 02:38, Taghavi, Mehdi <Mehdi.Taghavi@jacobs.com> wrote: Hello Professor

Aug 11

Louis Henri Furtado

Aug 4

Plotting distributions

Dear Prof. Bierlaire, In the youtube video Mixture models: taste heterogeneity (https://www.youtube.

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Plotting distributions

Dear Prof. Bierlaire, In the youtube video Mixture models: taste heterogeneity (https://www.youtube.

Aug 4

Nilu Babu, Bierlaire Michel5

Jul 28

Calculation of "Sampling Weight"

Thank you for the clarification. On Wed, Jul 27, 2022 at 9:47 PM Bierlaire Michel <michel.

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Calculation of "Sampling Weight"

Thank you for the clarification. On Wed, Jul 27, 2022 at 9:47 PM Bierlaire Michel <michel.

Jul 28

Jul 26

v655 missing file

Hi, Please be informed that the following file in the EdX is missing. Please provide me with it or

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v655 missing file

Hi, Please be informed that the following file in the EdX is missing. Please provide me with it or

Jul 26

Jul 25

Week 4 v44 Grading quiz grading instruction and model specifications

Hi, After submission of my completed quiz for Week 4, I am unable to get the grading instruction and

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Week 4 v44 Grading quiz grading instruction and model specifications

Hi, After submission of my completed quiz for Week 4, I am unable to get the grading instruction and

Jul 25

André Duarte, Bierlaire Michel3

Jul 20

Experimental Design / Python solution

Thank you Professor, I will do what you suggest. I´m already simulating choicesets and will do an

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Experimental Design / Python solution

Thank you Professor, I will do what you suggest. I´m already simulating choicesets and will do an

Jul 20

Fani Hatziioannidu

Jul 14

bioLogLogit expression

Dear Professor, dear Modellers, I am trying to estimate a mode choice model with frequencies or

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bioLogLogit expression

Dear Professor, dear Modellers, I am trying to estimate a mode choice model with frequencies or

Jul 14

Jul 3

how to speed up the ICLV model running time

Dear Professor Bierlaire, I am using the BIOGEME to solve an ICLV model (including 4 latent variables

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how to speed up the ICLV model running time

Dear Professor Bierlaire, I am using the BIOGEME to solve an ICLV model (including 4 latent variables

Jul 3

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