ApolloChoiceModelling forum

Hi,

I have been trying to use the EM algorithm to estimate a latent class-choice model with Apollo.

Since I kept getting errors in the procedure, I decided to follow the last two examples on the website (EM_LC_no_covariates and EM_LC_with_covariates) to see what was wrong with my code. However, I got exactly the same error when running these files using the Swissmetro dataset:
I have already tried several options for the "postEM" setting under lcEM_settings (i.e., 0, 1 or 2), and I have also upgraded to version 0.2.9.

I would be very thankful to get any orientation about what to do next?

Thanks for your work and for any help you can provide!

CDG

Hi,

Thank you for letting us know about this issue. This is indeed a bug in v0.2.8. We will fix it in the next official release, but in the meantime, I created a new version where the bug is fixed. You can download this new version from the links below. Choose the version for your computer's operating system:

Apollo v0.3.0 (beta) for Windows
Apollo v0.3.0 (beta) for Linux (source)

If you are using mac, please let me know and I will try generating a version for you, but it might take a couple of day.

You can install the package in RStudio by going to the menu bar (the menu at the top of the screen) and select Tools > Install Packages... . Then, in the window that will open, you select "Package archive" on the top drop-down menu. That will open another window to pick a file. Select the file you downloaded, and then click "Install".

Best wishes
David

Hi David,

Thanks for your prompt response!

I will try with this updated version. I use Windows so I don't think there should be any problems.

Best wishes,