ApolloChoiceModelling forum

Hi David, Thank you for your reply. Now, I understand that I can add the random parameters one by one. I am a little confused about how I can take advantage of results from the MNL model. Do you mean that I can only set the statistically significant coefficients from the MNL model as random paramete...

Hi David,

Many thanks for your reply. I will try it soon.

Best,
Shan

Thank you for your help. Sorry, I cannot provide the data without permission since the copyright belongs to my university. I deleted two alternative-specific constants, namely, asc_bus_shift_female and asc_metro_shift_female. Then, my model could run successfully, which is weird.

Hi Stephane, Thank you for your reply. I have changed the random draws from "Halton" to "mlhs". However, I still received this error report. I believe the error was reported at the beginning: right after "the Preparing user-defined functions. Testing likelihood function...&q...

Dear Sir, I hope that you are doing well. I tried to estimate a Mixed logit model, and the results were good when using only 100 Halton draws. However, an error was reported when the draws were raised to 1000, which is in apollo_mnl (mnl_setting, functionality): some utilities for component "MN...

Hi David, Thank you for your reply. Yes, my IDs are non-numeric. I will add these two lines before creating "change''. If I add so, does it mean that I have to delete the line which deletes the first two columns after estimating "change"? That is, am I supposed to delete the second li...

I am so sorry. Do you mean the error reported in R? It is an Error in FUN (Left, right): non-numeric argument to binary operator. I guess it is noted for the code: change=(predictions_new-predictions_base)/predictions_base.

Hi Stephane,

Thank you for your reply. The problem was solved after I deleted some non-English texts and rearranged my dataset.

Best wishes,
Shan

Hi Stephane, Many thanks for your reply. Here are the outputs I got: Aggregated prediction at MLE Sampled mean Sampled std.dev. Quantile 0.025 Quantile 0.972 car 2425 2439 110.09 2267 2651 bus 1363 1361 73.23 1252 1483 metro 2341 2329 85.23 2164 1483 Average prediction at MLE Sampled mean Sampled st...

Dear Sir, I hope that you are doing well. I tried to generate model predictions from a simple MNL model. However, an error was reported indicating a non-numeric argument to the binary operator for the code: change=(predictions_new-predictions_base)/predictions_base. I compared my codes for model pre...