callback_lambda: Create a custom callback

Description Usage Arguments See Also

View source: R/callbacks.R

Description

This callback is constructed with anonymous functions that will be called at the appropriate time. Note that the callbacks expects positional arguments, as:

Usage

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callback_lambda(on_epoch_begin = NULL, on_epoch_end = NULL,
  on_batch_begin = NULL, on_batch_end = NULL,
  on_train_batch_begin = NULL, on_train_batch_end = NULL,
  on_train_begin = NULL, on_train_end = NULL,
  on_predict_batch_begin = NULL, on_predict_batch_end = NULL,
  on_predict_begin = NULL, on_predict_end = NULL,
  on_test_batch_begin = NULL, on_test_batch_end = NULL,
  on_test_begin = NULL, on_test_end = NULL)

Arguments

on_epoch_begin

called at the beginning of every epoch.

on_epoch_end

called at the end of every epoch.

on_batch_begin

called at the beginning of every training batch.

on_batch_end

called at the end of every training batch.

on_train_batch_begin

called at the beginning of every batch.

on_train_batch_end

called at the end of every batch.

on_train_begin

called at the beginning of model training.

on_train_end

called at the end of model training.

on_predict_batch_begin

called at the beginning of a batch in predict methods.

on_predict_batch_end

called at the end of a batch in predict methods.

on_predict_begin

called at the beginning of prediction.

on_predict_end

called at the end of prediction.

on_test_batch_begin

called at the beginning of a batch in evaluate methods. Also called at the beginning of a validation batch in the fit methods, if validation data is provided.

on_test_batch_end

called at the end of a batch in evaluate methods. Also called at the end of a validation batch in the fit methods, if validation data is provided.

on_test_begin

called at the beginning of evaluation or validation.

on_test_end

called at the end of evaluation or validation.

See Also

Other callbacks: callback_csv_logger, callback_early_stopping, callback_learning_rate_scheduler, callback_model_checkpoint, callback_progbar_logger, callback_reduce_lr_on_plateau, callback_remote_monitor, callback_tensorboard, callback_terminate_on_naan


keras documentation built on Oct. 9, 2019, 1:04 a.m.