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using Flux | ||
using CSV | ||
using DataFrames | ||
using Plots | ||
using Statistics | ||
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# Load and preprocess the dataset | ||
data_file = "stock_prices.csv" # Replace with your CSV file containing stock prices | ||
data = CSV.read(data_file, DataFrame) | ||
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# Assuming the CSV has a column "Close" for closing prices | ||
prices = data.Close | ||
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# Normalize the data | ||
function normalize(data) | ||
return (data .- mean(data)) ./ std(data) | ||
end | ||
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normalized_prices = normalize(prices) | ||
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# Prepare the dataset for training | ||
function prepare_data(data, seq_len) | ||
X, Y = [], [] | ||
for i in 1:(length(data) - seq_len) | ||
push!(X, data[i:i+seq_len-1]) | ||
push!(Y, data[i+seq_len]) | ||
end | ||
return hcat(X...)', hcat(Y...) | ||
end | ||
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seq_len = 50 # Sequence length for LSTM | ||
X, Y = prepare_data(normalized_prices, seq_len) | ||
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# Split into training and test sets | ||
train_ratio = 0.8 | ||
train_size = Int(floor(train_ratio * size(X, 1))) | ||
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X_train, X_test = X[1:train_size, :], X[train_size+1:end, :] | ||
Y_train, Y_test = Y[1:train_size], Y[train_size+1:end] | ||
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# Convert to Flux tensors | ||
X_train = Flux.unsqueeze(Float32.(X_train), dims=3) | ||
X_test = Flux.unsqueeze(Float32.(X_test), dims=3) | ||
Y_train = Float32.(Y_train) | ||
Y_test = Float32.(Y_test) | ||
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# Define the LSTM model | ||
model = Chain( | ||
LSTM(seq_len, 50), | ||
Dense(50, 1) | ||
) | ||
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# Define loss function and optimizer | ||
loss(x, y) = Flux.mse(model(x), y) | ||
opt = ADAM(0.001) | ||
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# Training the model | ||
function train!(epochs) | ||
for epoch in 1:epochs | ||
for i in 1:train_size | ||
Flux.train!(loss, params(model), [(X_train[:, :, i], Y_train[i])], opt) | ||
end | ||
println("Epoch $epoch: Training Loss = $(loss(X_train, Y_train))") | ||
end | ||
end | ||
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train!(50) # Train for 50 epochs | ||
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# Test the model | ||
predictions = model(X_test) | ||
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# Plot the results | ||
plot(1:length(Y_test), Y_test, label="Actual") | ||
plot!(1:length(predictions), predictions, label="Predicted", linestyle=:dash) | ||
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# Save the model | ||
Flux.save("stock_price_predictor.bson", model) |