functions.rst

Standard Function implementations

chainer.functions

Chainer provides basic ~chainer.Function implementations in the chainer.functions package. Most of them are wrapped by plain Python functions, which users should use.

Note

As of v1.5, the concept of parameterized functions are gone, and they are replaced by corresponding ~chainer.Link implementations. They are still put in the ~chainer.functions namespace for backward compatibility, though it is strongly recommended to use them via the chainer.links package.

Activation functions

chainer.functions.clipped_relu chainer.functions.crelu chainer.functions.elu chainer.functions.hard_sigmoid chainer.functions.leaky_relu chainer.functions.log_softmax chainer.functions.lstm chainer.functions.maxout chainer.functions.prelu chainer.functions.relu chainer.functions.sigmoid chainer.functions.slstm chainer.functions.softmax chainer.functions.softplus chainer.functions.tanh

Array manipulations

chainer.functions.broadcast chainer.functions.broadcast_to chainer.functions.cast chainer.functions.concat chainer.functions.copy chainer.functions.depth2space chainer.functions.dstack chainer.functions.expand_dims chainer.functions.flatten chainer.functions.fliplr chainer.functions.flipud chainer.functions.get_item chainer.functions.hstack chainer.functions.im2col chainer.functions.pad chainer.functions.pad_sequence chainer.functions.permutate chainer.functions.reshape chainer.functions.resize_images chainer.functions.rollaxis chainer.functions.select_item chainer.functions.separate chainer.functions.space2depth chainer.functions.spatial_transformer_grid chainer.functions.spatial_transformer_sampler chainer.functions.split_axis chainer.functions.squeeze chainer.functions.stack chainer.functions.swapaxes chainer.functions.tile chainer.functions.transpose chainer.functions.transpose_sequence chainer.functions.vstack chainer.functions.where

Neural network connections

chainer.functions.bilinear chainer.functions.convolution_2d chainer.functions.convolution_nd chainer.functions.deconvolution_2d chainer.functions.deconvolution_nd chainer.functions.depthwise_convolution_2d chainer.functions.dilated_convolution_2d chainer.functions.embed_id chainer.functions.linear chainer.functions.n_step_bigru chainer.functions.n_step_bilstm chainer.functions.n_step_birnn chainer.functions.n_step_gru chainer.functions.n_step_lstm chainer.functions.n_step_rnn

Evaluation functions

chainer.functions.accuracy chainer.functions.binary_accuracy chainer.functions.classification_summary chainer.functions.r2_score

Loss functions

chainer.functions.bernoulli_nll chainer.functions.black_out chainer.functions.connectionist_temporal_classification chainer.functions.contrastive chainer.functions.crf1d chainer.functions.argmax_crf1d chainer.functions.cross_covariance chainer.functions.gaussian_kl_divergence chainer.functions.gaussian_nll chainer.functions.hinge chainer.functions.huber_loss chainer.functions.mean_absolute_error chainer.functions.mean_squared_error chainer.functions.negative_sampling chainer.functions.sigmoid_cross_entropy chainer.functions.softmax_cross_entropy chainer.functions.squared_error chainer.functions.triplet

Mathematical functions

chainer.functions.arccos chainer.functions.arcsin chainer.functions.arctan chainer.functions.argmax chainer.functions.argmin chainer.functions.average chainer.functions.batch_inv chainer.functions.batch_l2_norm_squared chainer.functions.batch_matmul chainer.functions.bias chainer.functions.ceil chainer.functions.clip chainer.functions.cos chainer.functions.cosh chainer.functions.exp chainer.functions.fmod chainer.functions.floor chainer.functions.identity chainer.functions.inv chainer.functions.linear_interpolate chainer.functions.log chainer.functions.log10 chainer.functions.log1p chainer.functions.log2 chainer.functions.logsumexp chainer.functions.matmul chainer.functions.max chainer.functions.maximum chainer.functions.mean chainer.functions.min chainer.functions.minimum chainer.functions.rsqrt chainer.functions.scale chainer.functions.sin chainer.functions.sinh chainer.functions.sqrt chainer.functions.square chainer.functions.squared_difference chainer.functions.sum chainer.functions.tanh chainer.functions.tan

Noise injections

chainer.functions.dropout chainer.functions.gaussian chainer.functions.simplified_dropconnect

Normalization functions

chainer.functions.batch_normalization chainer.functions.fixed_batch_normalization chainer.functions.local_response_normalization chainer.functions.normalize

Spatial pooling

chainer.functions.average_pooling_2d chainer.functions.average_pooling_nd chainer.functions.max_pooling_2d chainer.functions.max_pooling_nd chainer.functions.roi_pooling_2d chainer.functions.spatial_pyramid_pooling_2d chainer.functions.unpooling_2d chainer.functions.upsampling_2d

Utility functions

chainer.functions.forget