Does this package support lightGBMs?

[flippercy]

Hi @vruusmann:

Does this package support lightGBM models, please?

Thank you.

[vruusmann]

The R wrapper for LightGBM models is some weird & super complex class, which cannot be persisted using the standard saveRDS() function call.

Therefore, you must go use the manual workflow:

1. Train a LightGBM model in R
2. Save the LightGBM portion of this weird & complex object into a LGBM file using the lgbm.save() function: https://lightgbm.readthedocs.io/en/latest/R/reference/lgb.save.html
3. Convert the LGBM file using the JPMML-LightGBM command-line application.

[vruusmann]

The R wrapper for LightGBM models is some weird & super complex class, which cannot be persisted using the standard saveRDS() function call.

This issue might have been fixed in LightGBM version 4.0.0.

See microsoft/LightGBM#4685 and microsoft/LightGBM#4296

Reopening, as a reminder to re-evaluate the situation.