R Interface to 'Keras'

activation_relu | Activation functions |

application_densenet | Instantiates the DenseNet architecture. |

application_inception_resnet_v2 | Inception-ResNet v2 model, with weights trained on ImageNet |

application_inception_v3 | Inception V3 model, with weights pre-trained on ImageNet. |

application_mobilenet | MobileNet model architecture. |

application_nasnet | Instantiates a NASNet model. |

application_resnet50 | ResNet50 model for Keras. |

application_vgg | VGG16 and VGG19 models for Keras. |

application_xception | Xception V1 model for Keras. |

backend | Keras backend tensor engine |

bidirectional | Bidirectional wrapper for RNNs. |

callback_csv_logger | Callback that streams epoch results to a csv file |

callback_early_stopping | Stop training when a monitored quantity has stopped... |

callback_lambda | Create a custom callback |

callback_learning_rate_scheduler | Learning rate scheduler. |

callback_model_checkpoint | Save the model after every epoch. |

callback_progbar_logger | Callback that prints metrics to stdout. |

callback_reduce_lr_on_plateau | Reduce learning rate when a metric has stopped improving. |

callback_remote_monitor | Callback used to stream events to a server. |

callback_tensorboard | TensorBoard basic visualizations |

callback_terminate_on_naan | Callback that terminates training when a NaN loss is... |

clone_model | Clone a model instance. |

compile | Configure a Keras model for training |

constraint_maxnorm | MaxNorm weight constraint |

constraint_minmaxnorm | MinMaxNorm weight constraint |

constraint_nonneg | NonNeg weight constraint |

constraint_unitnorm | UnitNorm weight constraint |

count_params | Count the total number of scalars composing the weights. |

create_layer | Create a Keras Layer |

dataset_boston_housing | Boston housing price regression dataset |

dataset_cifar10 | CIFAR10 small image classification |

dataset_cifar100 | CIFAR100 small image classification |

dataset_fashion_mnist | Fashion-MNIST database of fashion articles |

dataset_imdb | IMDB Movie reviews sentiment classification |

dataset_mnist | MNIST database of handwritten digits |

dataset_reuters | Reuters newswire topics classification |

evaluate_generator | Evaluates the model on a data generator. |

evaluate.keras.engine.training.Model | Evaluate a Keras model |

export_savedmodel.keras.engine.training.Model | Export a Saved Model |

fit | Train a Keras model |

fit_generator | Fits the model on data yielded batch-by-batch by a generator. |

fit_image_data_generator | Fit image data generator internal statistics to some sample... |

fit_text_tokenizer | Update tokenizer internal vocabulary based on a list of texts... |

flow_images_from_data | Generates batches of augmented/normalized data from image... |

flow_images_from_directory | Generates batches of data from images in a directory (with... |

freeze_weights | Freeze and unfreeze weights |

generator_next | Retrieve the next item from a generator |

get_config | Layer/Model configuration |

get_file | Downloads a file from a URL if it not already in the cache. |

get_input_at | Retrieve tensors for layers with multiple nodes |

get_layer | Retrieves a layer based on either its name (unique) or index. |

get_weights | Layer/Model weights as R arrays |

hdf5_matrix | Representation of HDF5 dataset to be used instead of an R... |

image_data_generator | Generate minibatches of image data with real-time data... |

image_load | Loads an image into PIL format. |

imagenet_decode_predictions | Decodes the prediction of an ImageNet model. |

imagenet_preprocess_input | Preprocesses a tensor or array encoding a batch of images. |

image_to_array | 3D array representation of images |

implementation | Keras implementation |

initializer_constant | Initializer that generates tensors initialized to a constant... |

initializer_glorot_normal | Glorot normal initializer, also called Xavier normal... |

initializer_glorot_uniform | Glorot uniform initializer, also called Xavier uniform... |

initializer_he_normal | He normal initializer. |

initializer_he_uniform | He uniform variance scaling initializer. |

initializer_identity | Initializer that generates the identity matrix. |

initializer_lecun_normal | LeCun normal initializer. |

initializer_lecun_uniform | LeCun uniform initializer. |

initializer_ones | Initializer that generates tensors initialized to 1. |

initializer_orthogonal | Initializer that generates a random orthogonal matrix. |

initializer_random_normal | Initializer that generates tensors with a normal... |

initializer_random_uniform | Initializer that generates tensors with a uniform... |

initializer_truncated_normal | Initializer that generates a truncated normal distribution. |

initializer_variance_scaling | Initializer capable of adapting its scale to the shape of... |

initializer_zeros | Initializer that generates tensors initialized to 0. |

install_keras | Install Keras and the TensorFlow backend |

is_keras_available | Check if Keras is Available |

k_abs | Element-wise absolute value. |

k_all | Bitwise reduction (logical AND). |

k_any | Bitwise reduction (logical OR). |

k_arange | Creates a 1D tensor containing a sequence of integers. |

k_argmax | Returns the index of the maximum value along an axis. |

k_argmin | Returns the index of the minimum value along an axis. |

k_backend | Active Keras backend |

k_batch_dot | Batchwise dot product. |

k_batch_flatten | Turn a nD tensor into a 2D tensor with same 1st dimension. |

k_batch_get_value | Returns the value of more than one tensor variable. |

k_batch_normalization | Applies batch normalization on x given mean, var, beta and... |

k_batch_set_value | Sets the values of many tensor variables at once. |

k_bias_add | Adds a bias vector to a tensor. |

k_binary_crossentropy | Binary crossentropy between an output tensor and a target... |

k_cast | Casts a tensor to a different dtype and returns it. |

k_cast_to_floatx | Cast an array to the default Keras float type. |

k_categorical_crossentropy | Categorical crossentropy between an output tensor and a... |

k_clear_session | Destroys the current TF graph and creates a new one. |

k_clip | Element-wise value clipping. |

k_concatenate | Concatenates a list of tensors alongside the specified axis. |

k_constant | Creates a constant tensor. |

k_conv1d | 1D convolution. |

k_conv2d | 2D convolution. |

k_conv2d_transpose | 2D deconvolution (i.e. transposed convolution). |

k_conv3d | 3D convolution. |

k_conv3d_transpose | 3D deconvolution (i.e. transposed convolution). |

k_cos | Computes cos of x element-wise. |

k_count_params | Returns the static number of elements in a Keras variable or... |

k_ctc_batch_cost | Runs CTC loss algorithm on each batch element. |

k_ctc_decode | Decodes the output of a softmax. |

k_ctc_label_dense_to_sparse | Converts CTC labels from dense to sparse. |

k_cumprod | Cumulative product of the values in a tensor, alongside the... |

k_cumsum | Cumulative sum of the values in a tensor, alongside the... |

k_depthwise_conv2d | Depthwise 2D convolution with separable filters. |

k_dot | Multiplies 2 tensors (and/or variables) and returns a... |

k_dropout | Sets entries in 'x' to zero at random, while scaling the... |

k_dtype | Returns the dtype of a Keras tensor or variable, as a string. |

k_elu | Exponential linear unit. |

k_epsilon | Fuzz factor used in numeric expressions. |

k_equal | Element-wise equality between two tensors. |

keras_array | Keras array object |

KerasCallback | Base R6 class for Keras callbacks |

KerasLayer | Base R6 class for Keras layers |

keras_model | Keras Model |

keras_model_sequential | Keras Model composed of a linear stack of layers |

keras-package | R interface to Keras |

k_eval | Evaluates the value of a variable. |

k_exp | Element-wise exponential. |

k_expand_dims | Adds a 1-sized dimension at index 'axis'. |

k_eye | Instantiate an identity matrix and returns it. |

k_flatten | Flatten a tensor. |

k_floatx | Default float type |

k_foldl | Reduce elems using fn to combine them from left to right. |

k_foldr | Reduce elems using fn to combine them from right to left. |

k_function | Instantiates a Keras function |

k_gather | Retrieves the elements of indices 'indices' in the tensor... |

k_get_session | TF session to be used by the backend. |

k_get_uid | Get the uid for the default graph. |

k_get_value | Returns the value of a variable. |

k_get_variable_shape | Returns the shape of a variable. |

k_gradients | Returns the gradients of 'variables' w.r.t. 'loss'. |

k_greater | Element-wise truth value of (x > y). |

k_greater_equal | Element-wise truth value of (x >= y). |

k_hard_sigmoid | Segment-wise linear approximation of sigmoid. |

k_identity | Returns a tensor with the same content as the input tensor. |

k_image_data_format | Default image data format convention ('channels_first' or... |

k_in_test_phase | Selects 'x' in test phase, and 'alt' otherwise. |

k_in_top_k | Returns whether the 'targets' are in the top 'k'... |

k_in_train_phase | Selects 'x' in train phase, and 'alt' otherwise. |

k_int_shape | Returns the shape of tensor or variable as a list of int or... |

k_is_keras_tensor | Returns whether 'x' is a Keras tensor. |

k_is_placeholder | Returns whether 'x' is a placeholder. |

k_is_sparse | Returns whether a tensor is a sparse tensor. |

k_l2_normalize | Normalizes a tensor wrt the L2 norm alongside the specified... |

k_learning_phase | Returns the learning phase flag. |

k_less | Element-wise truth value of (x < y). |

k_less_equal | Element-wise truth value of (x <= y). |

k_local_conv1d | Apply 1D conv with un-shared weights. |

k_local_conv2d | Apply 2D conv with un-shared weights. |

k_log | Element-wise log. |

k_logsumexp | Computes log(sum(exp(elements across dimensions of a... |

k_manual_variable_initialization | Sets the manual variable initialization flag. |

k_map_fn | Map the function fn over the elements elems and return the... |

k_max | Maximum value in a tensor. |

k_maximum | Element-wise maximum of two tensors. |

k_mean | Mean of a tensor, alongside the specified axis. |

k_min | Minimum value in a tensor. |

k_minimum | Element-wise minimum of two tensors. |

k_moving_average_update | Compute the moving average of a variable. |

k_ndim | Returns the number of axes in a tensor, as an integer. |

k_normalize_batch_in_training | Computes mean and std for batch then apply... |

k_not_equal | Element-wise inequality between two tensors. |

k_one_hot | Computes the one-hot representation of an integer tensor. |

k_ones | Instantiates an all-ones tensor variable and returns it. |

k_ones_like | Instantiates an all-ones variable of the same shape as... |

k_permute_dimensions | Permutes axes in a tensor. |

k_placeholder | Instantiates a placeholder tensor and returns it. |

k_pool2d | 2D Pooling. |

k_pool3d | 3D Pooling. |

k_pow | Element-wise exponentiation. |

k_print_tensor | Prints 'message' and the tensor value when evaluated. |

k_prod | Multiplies the values in a tensor, alongside the specified... |

k_random_binomial | Returns a tensor with random binomial distribution of values. |

k_random_normal | Returns a tensor with normal distribution of values. |

k_random_normal_variable | Instantiates a variable with values drawn from a normal... |

k_random_uniform | Returns a tensor with uniform distribution of values. |

k_random_uniform_variable | Instantiates a variable with values drawn from a uniform... |

k_relu | Rectified linear unit. |

k_repeat | Repeats a 2D tensor. |

k_repeat_elements | Repeats the elements of a tensor along an axis. |

k_reset_uids | Reset graph identifiers. |

k_reshape | Reshapes a tensor to the specified shape. |

k_resize_images | Resizes the images contained in a 4D tensor. |

k_resize_volumes | Resizes the volume contained in a 5D tensor. |

k_reverse | Reverse a tensor along the specified axes. |

k_rnn | Iterates over the time dimension of a tensor |

k_round | Element-wise rounding to the closest integer. |

k_separable_conv2d | 2D convolution with separable filters. |

k_set_learning_phase | Sets the learning phase to a fixed value. |

k_set_value | Sets the value of a variable, from an R array. |

k_shape | Returns the symbolic shape of a tensor or variable. |

k_sigmoid | Element-wise sigmoid. |

k_sign | Element-wise sign. |

k_sin | Computes sin of x element-wise. |

k_softmax | Softmax of a tensor. |

k_softplus | Softplus of a tensor. |

k_softsign | Softsign of a tensor. |

k_sparse_categorical_crossentropy | Categorical crossentropy with integer targets. |

k_spatial_2d_padding | Pads the 2nd and 3rd dimensions of a 4D tensor. |

k_spatial_3d_padding | Pads 5D tensor with zeros along the depth, height, width... |

k_sqrt | Element-wise square root. |

k_square | Element-wise square. |

k_squeeze | Removes a 1-dimension from the tensor at index 'axis'. |

k_stack | Stacks a list of rank 'R' tensors into a rank 'R+1' tensor. |

k_std | Standard deviation of a tensor, alongside the specified axis. |

k_stop_gradient | Returns 'variables' but with zero gradient w.r.t. every other... |

k_sum | Sum of the values in a tensor, alongside the specified axis. |

k_switch | Switches between two operations depending on a scalar value. |

k_tanh | Element-wise tanh. |

k_temporal_padding | Pads the middle dimension of a 3D tensor. |

k_tile | Creates a tensor by tiling 'x' by 'n'. |

k_to_dense | Converts a sparse tensor into a dense tensor and returns it. |

k_transpose | Transposes a tensor and returns it. |

k_truncated_normal | Returns a tensor with truncated random normal distribution of... |

k_update | Update the value of 'x' to 'new_x'. |

k_update_add | Update the value of 'x' by adding 'increment'. |

k_update_sub | Update the value of 'x' by subtracting 'decrement'. |

k_var | Variance of a tensor, alongside the specified axis. |

k_variable | Instantiates a variable and returns it. |

k_zeros | Instantiates an all-zeros variable and returns it. |

k_zeros_like | Instantiates an all-zeros variable of the same shape as... |

layer_activation | Apply an activation function to an output. |

layer_activation_elu | Exponential Linear Unit. |

layer_activation_leaky_relu | Leaky version of a Rectified Linear Unit. |

layer_activation_parametric_relu | Parametric Rectified Linear Unit. |

layer_activation_softmax | Softmax activation function. |

layer_activation_thresholded_relu | Thresholded Rectified Linear Unit. |

layer_activity_regularization | Layer that applies an update to the cost function based input... |

layer_add | Layer that adds a list of inputs. |

layer_alpha_dropout | Applies Alpha Dropout to the input. |

layer_average | Layer that averages a list of inputs. |

layer_average_pooling_1d | Average pooling for temporal data. |

layer_average_pooling_2d | Average pooling operation for spatial data. |

layer_average_pooling_3d | Average pooling operation for 3D data (spatial or... |

layer_batch_normalization | Batch normalization layer (Ioffe and Szegedy, 2014). |

layer_concatenate | Layer that concatenates a list of inputs. |

layer_conv_1d | 1D convolution layer (e.g. temporal convolution). |

layer_conv_2d | 2D convolution layer (e.g. spatial convolution over images). |

layer_conv_2d_transpose | Transposed 2D convolution layer (sometimes called... |

layer_conv_3d | 3D convolution layer (e.g. spatial convolution over volumes). |

layer_conv_3d_transpose | Transposed 3D convolution layer (sometimes called... |

layer_conv_lstm_2d | Convolutional LSTM. |

layer_cropping_1d | Cropping layer for 1D input (e.g. temporal sequence). |

layer_cropping_2d | Cropping layer for 2D input (e.g. picture). |

layer_cropping_3d | Cropping layer for 3D data (e.g. spatial or spatio-temporal). |

layer_cudnn_gru | Fast GRU implementation backed by CuDNN. |

layer_cudnn_lstm | Fast LSTM implementation backed by CuDNN. |

layer_dense | Add a densely-connected NN layer to an output |

layer_dot | Layer that computes a dot product between samples in two... |

layer_dropout | Applies Dropout to the input. |

layer_embedding | Turns positive integers (indexes) into dense vectors of fixed... |

layer_flatten | Flattens an input |

layer_gaussian_dropout | Apply multiplicative 1-centered Gaussian noise. |

layer_gaussian_noise | Apply additive zero-centered Gaussian noise. |

layer_global_average_pooling_1d | Global average pooling operation for temporal data. |

layer_global_average_pooling_2d | Global average pooling operation for spatial data. |

layer_global_average_pooling_3d | Global Average pooling operation for 3D data. |

layer_global_max_pooling_1d | Global max pooling operation for temporal data. |

layer_global_max_pooling_2d | Global max pooling operation for spatial data. |

layer_global_max_pooling_3d | Global Max pooling operation for 3D data. |

layer_gru | Gated Recurrent Unit - Cho et al. |

layer_input | Input layer |

layer_lambda | Wraps arbitrary expression as a layer |

layer_locally_connected_1d | Locally-connected layer for 1D inputs. |

layer_locally_connected_2d | Locally-connected layer for 2D inputs. |

layer_lstm | Long-Short Term Memory unit - Hochreiter 1997. |

layer_masking | Masks a sequence by using a mask value to skip timesteps. |

layer_maximum | Layer that computes the maximum (element-wise) a list of... |

layer_max_pooling_1d | Max pooling operation for temporal data. |

layer_max_pooling_2d | Max pooling operation for spatial data. |

layer_max_pooling_3d | Max pooling operation for 3D data (spatial or... |

layer_minimum | Layer that computes the minimum (element-wise) a list of... |

layer_multiply | Layer that multiplies (element-wise) a list of inputs. |

layer_permute | Permute the dimensions of an input according to a given... |

layer_repeat_vector | Repeats the input n times. |

layer_reshape | Reshapes an output to a certain shape. |

layer_separable_conv_1d | Depthwise separable 1D convolution. |

layer_separable_conv_2d | Depthwise separable 2D convolution. |

layer_simple_rnn | Fully-connected RNN where the output is to be fed back to... |

layer_spatial_dropout_1d | Spatial 1D version of Dropout. |

layer_spatial_dropout_2d | Spatial 2D version of Dropout. |

layer_spatial_dropout_3d | Spatial 3D version of Dropout. |

layer_subtract | Layer that subtracts two inputs. |

layer_upsampling_1d | Upsampling layer for 1D inputs. |

layer_upsampling_2d | Upsampling layer for 2D inputs. |

layer_upsampling_3d | Upsampling layer for 3D inputs. |

layer_zero_padding_1d | Zero-padding layer for 1D input (e.g. temporal sequence). |

layer_zero_padding_2d | Zero-padding layer for 2D input (e.g. picture). |

layer_zero_padding_3d | Zero-padding layer for 3D data (spatial or spatio-temporal). |

loss_mean_squared_error | Model loss functions |

make_sampling_table | Generates a word rank-based probabilistic sampling table. |

metric_binary_accuracy | Model performance metrics |

model_to_json | Model configuration as JSON |

model_to_yaml | Model configuration as YAML |

multi-assign | Assign values to names |

multi_gpu_model | Replicates a model on different GPUs. |

normalize | Normalize a matrix or nd-array |

optimizer_adadelta | Adadelta optimizer. |

optimizer_adagrad | Adagrad optimizer. |

optimizer_adam | Adam optimizer |

optimizer_adamax | Adamax optimizer |

optimizer_nadam | Nesterov Adam optimizer |

optimizer_rmsprop | RMSProp optimizer |

optimizer_sgd | Stochastic gradient descent optimizer |

pad_sequences | Pads each sequence to the same length (length of the longest... |

pipe | Pipe operator |

plot.keras_training_history | Plot training history |

pop_layer | Remove the last layer in a model |

predict_generator | Generates predictions for the input samples from a data... |

predict.keras.engine.training.Model | Generate predictions from a Keras model |

predict_on_batch | Returns predictions for a single batch of samples. |

predict_proba | Generates probability or class probability predictions for... |

reexports | Objects exported from other packages |

regularizer_l1 | L1 and L2 regularization |

reset_states | Reset the states for a layer |

save_model_hdf5 | Save/Load models using HDF5 files |

save_model_weights_hdf5 | Save/Load model weights using HDF5 files |

save_text_tokenizer | Save a text tokenizer to an external file |

sequences_to_matrix | Convert a list of sequences into a matrix. |

serialize_model | Serialize a model to an R object |

skipgrams | Generates skipgram word pairs. |

summary.keras.engine.training.Model | Print a summary of a Keras model |

text_hashing_trick | Converts a text to a sequence of indexes in a fixed-size... |

text_one_hot | One-hot encode a text into a list of word indexes in a... |

texts_to_matrix | Convert a list of texts to a matrix. |

texts_to_sequences | Transform each text in texts in a sequence of integers. |

texts_to_sequences_generator | Transforms each text in texts in a sequence of integers. |

text_tokenizer | Text tokenization utility |

text_to_word_sequence | Convert text to a sequence of words (or tokens). |

time_distributed | Apply a layer to every temporal slice of an input. |

to_categorical | Converts a class vector (integers) to binary class matrix. |

train_on_batch | Single gradient update or model evaluation over one batch of... |

use_implementation | Select a Keras implementation and backend |

with_custom_object_scope | Provide a scope with mappings of names to custom objects |

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