import time
import torch
import torch.nn as nn
from einops import rearrange
from finol.data_layer.scaler_selector import ScalerSelector
from finol.utils import load_config
[文件]class CNN(nn.Module):
"""
Class to generate predicted scores for the input assets based on the Convolutional Neural Network (CNN) model.
The CNN model takes an input tensor ``x`` of shape `(batch_size, num_assets, height, width)`, where
`height` and `width` are the dimensions of the image for each asset. The model applies a series of convolutional
layers to each asset's image, with each layer followed by a ReLU activation and a pooling layer to reduce
the spatial dimensions.
The final output of the model is a tensor of shape ``(batch_size, num_assets)``, where each element
represents the predicted score for the corresponding asset.
:param model_args: Dictionary containing model arguments, such as the number of features.
:param model_params: Dictionary containing model hyperparameters, such as the kernel size, the hidden size, and the dropout rate.
Example:
.. code:: python
>>> from finol.data_layer.dataset_loader import DatasetLoader
>>> from finol.model_layer.model_instantiator import ModelInstantiator
>>> from finol.utils import load_config, update_config, portfolio_selection
>>>
>>> # Configuration
>>> config = load_config()
>>> config["MODEL_NAME"] = "CNN"
>>> config["MODEL_PARAMS"]["CNN"]["KERNEL_SIZE"] = 3
>>> config["MODEL_PARAMS"]["CNN"]["STRIDE"] = 1
>>> config["MODEL_PARAMS"]["CNN"]["HIDDEN_SIZE"] = 4
>>> ...
>>> update_config(config)
>>>
>>> # Data Layer
>>> load_dataset_output = DatasetLoader().load_dataset()
>>>
>>> # Model Layer & Optimization Layer
>>> ...
>>> model = ModelInstantiator(load_dataset_output).instantiate_model()
>>> print(f"model: {model}")
>>> ...
>>> train_loader = load_dataset_output["train_loader"]
>>> for i, data in enumerate(train_loader, 1):
... x_data, label = data
... final_scores = model(x_data.float())
... portfolio = portfolio_selection(final_scores)
... print(f"batch {i} input shape: {x_data.shape}")
... print(f"batch {i} label shape: {label.shape}")
... print(f"batch {i} output shape: {portfolio.shape}")
... print("-"*50)
.. note::
Users can refer to this implementation and use it as a starting point for developing their own advanced CNN-based models.
\\
"""
def __init__(self, model_args, model_params):
super().__init__()
self.config = load_config()
self.model_args = model_args
self.model_params = model_params
# Convolutional layers
self.conv_layer_1 = nn.Sequential(
nn.Conv2d(1, 16, kernel_size=model_params["KERNEL_SIZE"], stride=model_params["STRIDE"]),
nn.ReLU(),
nn.MaxPool2d(2, 2),
)
self.conv_layer_2 = nn.Sequential(
nn.Conv2d(16, 32, kernel_size=model_params["KERNEL_SIZE"], stride=model_params["STRIDE"]),
nn.ReLU(),
nn.MaxPool2d(2, 2),
)
self.conv_layer_3 = nn.Sequential(
nn.Conv2d(32, 64, kernel_size=model_params["KERNEL_SIZE"], stride=model_params["STRIDE"]),
nn.ReLU(),
nn.MaxPool2d(2, 2)
)
# Calculate the size of the output after the convolutions and pooling layers
with torch.no_grad():
dummy_input = torch.zeros((1, 1, self.config["DATA_AUGMENTATION_CONFIG"]["IMAGE_DATA"]["SIDE_LENGTH"], self.config["DATA_AUGMENTATION_CONFIG"]["IMAGE_DATA"]["SIDE_LENGTH"]))
x = self.conv_layer_1(dummy_input)
x = self.conv_layer_2(x)
x = self.conv_layer_3(x)
conv_output_size = x.numel() # Calculate total number of elements
# Fully connected layers
self.fc_layers = nn.Sequential(
nn.Flatten(),
nn.Linear(conv_output_size, model_params["HIDDEN_SIZE"]),
nn.ReLU(),
nn.Dropout(model_params["DROPOUT"]),
nn.Linear(model_params["HIDDEN_SIZE"], 1) # Each asset gets one score
)
[文件] def forward(self, x: torch.Tensor) -> torch.Tensor:
"""
Forward pass of the model.
:param x: Input tensor of shape `(batch_size, num_assets, height, width)`.
:return: Output tensor of shape ``(batch_size, num_assets)`` containing the predicted scores for each asset.
"""
batch_size, num_assets, height, width = x.size()
"""Input Transformation"""
# Reshape the input to fit the convolutional layers
x = x.view(-1, 1, height, width) # [batch_size, num_assets, height, width] -> [batch_size * num_assets, height, width]
x = self.conv_layer_1(x)
x = self.conv_layer_2(x)
x = self.conv_layer_3(x)
x = self.fc_layers(x)
"""Final Scores for Assets"""
final_scores = x.view(batch_size, num_assets) # Reshape to get scores for each asset
return final_scores
