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- model <- keras_model_sequential() %>%
- layer_conv_2d(filters = 32, kernel_size = c(3, 3), activation = "relu", input_shape = c(150, 150, 3)) %>%
- layer_max_pooling_2d(pool_size = c(2, 2)) %>%
- layer_conv_2d(filters = 64, kernel_size = c(3, 3), activation = "relu") %>%
- layer_max_pooling_2d(pool_size = c(2, 2)) %>%
- layer_conv_2d(filters = 128, kernel_size = c(3, 3), activation = "relu") %>%
- layer_max_pooling_2d(pool_size = c(2, 2)) %>%
- layer_conv_2d(filters = 128, kernel_size = c(3, 3), activation = "relu") %>%
- layer_max_pooling_2d(pool_size = c(2, 2)) %>%
- layer_flatten() %>%
- layer_dropout(rate = 0.5) %>%
- layer_dense(units = 512, activation = "relu") %>%
- layer_dense(units = 1, activation = "sigmoid")
- model %>% compile(
- loss = "binary_crossentropy",
- optimizer = optimizer_rmsprop(lr = 1e-4), metrics = c("acc")
- )
- # Use augmented images:
- datagen <- image_data_generator(
- rescale = 1/255,
- rotation_range = 40,
- width_shift_range = 0.2,
- height_shift_range = 0.2,
- shear_range = 0.2,
- zoom_range = 0.2,
- horizontal_flip = TRUE
- )
- # Note that the validation data shouldn’t be augmented!
- test_datagen <-
- image_data_generator(rescale = 1/255)
- train_generator <- flow_images_from_directory(
- train_dir,
- datagen,
- target_size = c(150, 150),
- batch_size = 32,
- class_mode = "binary"
- )
- validation_generator <- flow_images_from_directory(
- validation_dir,
- test_datagen,
- target_size = c(150, 150),
- batch_size = 32,
- class_mode = "binary"
- )
- ## Train model:
- history <- model %>% fit_generator(
- train_generator,
- steps_per_epoch = 50,
- epochs = 30,
- validation_data = validation_generator,
- validation_steps = 25
- )
- Error in py_call_impl(callable, dotsargs, dotsargs,dotskeywords) : IndexError: list index out of range
- stop(structure(list(message = "IndexError: list index out of range", call = py_call_impl(callable, dotsargs, dotsargs,dotskeywords), cppstack = structure(list(file = "", line = -1L, stack = c("/home/boris/R/x86_64-pc-linux-gnu-library/3.6/reticulate/libs/reticulate.so(Rcpp::exception::exception(char const*, bool)+0x7a) [0x7f08f395ea4a]", "/home/boris/R/x86_64-pc-linux-gnu-library/3.6/reticulate/libs/reticulate.so(Rcpp::stop(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x27) [0x7f08f395eba7]", …
- finalize at training_utils.py#108
- model_iteration at training_generator.py#208
- fit_generator at training.py#1426
- (structure(function (…) { dots <- py_resolve_dots(list(…)) result <- py_call_impl(callable, dotsargs, dotsargs,dotskeywords) …
- do.call(func, args)
- call_generator_function(object$fit_generator, list(generator = generator, steps_per_epoch = as.integer(steps_per_epoch), epochs = as.integer(epochs), verbose = as.integer(verbose), callbacks = normalize_callbacks(view_metrics, callbacks), validation_data = validation_data, validation_steps = as_nullable_integer(validation_steps), …
- fit_generator(., train_generator, steps_per_epoch = 50, epochs = 30, validation_data = validation_generator, validation_steps = 25)
- function_list[k]
- withVisible(function_list[k])
- freduce(value, ‘_function_list’)
- ‘_fseq’(‘_lhs’)
- eval(quote(‘_fseq’(‘_lhs’)), env, env)
- eval(quote(‘_fseq’(‘_lhs’)), env, env)
- withVisible(eval(quote(‘_fseq’(‘_lhs’)), env, env))
- model %>% fit_generator(train_generator, steps_per_epoch = 50, epochs = 30, validation_data = validation_generator, validation_steps = 25)
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