C API refitting

[eightreal]

Hello , I have see the LGBM_BoosterRefit api in C-API
is there more description about it? a example code is much better, I 'm try to do continue learning by new data , but there is few doc.

[eightreal]

In python , I see some example code like

refit(data=x_test, label=y_test)

but , how it work in C_Api, how can I get the input

const int32_t* leaf_preds,
int32_t nrow,
int32_t ncol
                                        ```

[eightreal]

I read the python source code
So, I need call the LGBM_BoosterPredictForMat to get the leaf index (by my new dataset )
the input leaf index for refit ,
Is the workflow correct?
and whether should I call the LGBM_BoosterResetTrainingData before call refit?

[eightreal]

OH, I also see you have call a new booster and merge.

[eightreal]

is there any member can help answer my question?

[jameslamb]

Please look through what Booster.refit() in the Python package does.

LightGBM/python-package/lightgbm/basic.py

Line 4747 in 88cec47

def refit(

[eightreal]

I can do refit by this workflow, but I check that you create a empty model and merge old model, so can I reset training dataset directly?