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Function for training and fine-tuning a RoBERTa model

Source: R/transformer_roberta.R
train_tune_roberta_model.Rd

This function can be used to train or fine-tune a transformer based on RoBERTa architecture with the help of the python libraries 'transformers', 'datasets', and 'tokenizers'.

Usage

train_tune_roberta_model(
  ml_framework = aifeducation_config$get_framework(),
  output_dir,
  model_dir_path,
  raw_texts,
  p_mask = 0.15,
  val_size = 0.1,
  n_epoch = 1,
  batch_size = 12,
  chunk_size = 250,
  full_sequences_only = FALSE,
  min_seq_len = 50,
  learning_rate = 0.03,
  n_workers = 1,
  multi_process = FALSE,
  sustain_track = TRUE,
  sustain_iso_code = NULL,
  sustain_region = NULL,
  sustain_interval = 15,
  trace = TRUE,
  keras_trace = 1,
  pytorch_trace = 1,
  pytorch_safetensors = TRUE
)

Arguments

ml_framework

string Framework to use for training and inference. ml_framework="tensorflow" for 'tensorflow' and ml_framework="pytorch" for 'pytorch'.

output_dir

string Path to the directory where the final model should be saved. If the directory does not exist, it will be created.

model_dir_path

string Path to the directory where the original model is stored.

raw_texts

vector containing the raw texts for training.

p_mask

double Ratio determining the number of words/tokens for masking.

val_size

double Ratio determining the amount of token chunks used for validation.

n_epoch

int Number of epochs for training.

batch_size

int Size of batches.

chunk_size

int Size of every chunk for training.

full_sequences_only

bool TRUE for using only chunks with a sequence length equal to chunk_size.

min_seq_len

int Only relevant if full_sequences_only=FALSE. Value determines the minimal sequence length for inclusion in training process.

learning_rate

bool Learning rate for adam optimizer.

n_workers

int Number of workers. Only relevant if ml_framework="tensorflow".

multi_process

bool TRUE if multiple processes should be activated. Only relevant if ml_framework="tensorflow".

sustain_track

bool If TRUE energy consumption is tracked during training via the python library codecarbon.

sustain_iso_code

string ISO code (Alpha-3-Code) for the country. This variable must be set if sustainability should be tracked. A list can be found on Wikipedia: https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes.

sustain_region

Region within a country. Only available for USA and Canada See the documentation of codecarbon for more information. https://mlco2.github.io/codecarbon/parameters.html

sustain_interval

integer Interval in seconds for measuring power usage.

trace

bool TRUE if information on the progress should be printed to the console.

keras_trace

int keras_trace=0 does not print any information about the training process from keras on the console. keras_trace=1 prints a progress bar. keras_trace=2 prints one line of information for every epoch. Only relevant if ml_framework="tensorflow".

pytorch_trace

int pytorch_trace=0 does not print any information about the training process from pytorch on the console. pytorch_trace=1 prints a progress bar.

pytorch_safetensors

bool If TRUE a 'pytorch' model is saved in safetensors format. If FALSE or 'safetensors' not available it is saved in the standard pytorch format (.bin). Only relevant for pytorch models.

Value

This function does not return an object. Instead the trained or fine-tuned model is saved to disk.

Note

Pre-Trained models which can be fine-tuned with this function are available at https://huggingface.co/. New models can be created via the function create_roberta_model.

Training of this model makes use of dynamic masking.

References

Liu, Y., Ott, M., Goyal, N., Du, J., Joshi, M., Chen, D., Levy, O., Lewis, M., Zettlemoyer, L., & Stoyanov, V. (2019). RoBERTa: A Robustly Optimized BERT Pretraining Approach. doi:10.48550/arXiv.1907.11692

Hugging Face Documentation https://huggingface.co/docs/transformers/model_doc/roberta#transformers.RobertaConfig

See also

Other Transformer: create_bert_model(), create_deberta_v2_model(), create_funnel_model(), create_longformer_model(), create_roberta_model(), train_tune_bert_model(), train_tune_deberta_v2_model(), train_tune_funnel_model(), train_tune_longformer_model()