predict_future_prices.py

# predict the closing price of the next trading day

model.eval()

x = torch.tensor(data_x_unseen).float().to(config["training"]["device"]).unsqueeze(0).unsqueeze(2) # this is the data type and shape required, [batch, sequence, feature]
prediction = model(x)
prediction = prediction.cpu().detach().numpy()

# prepare plots

plot_range = 10
to_plot_data_y_val = np.zeros(plot_range)
to_plot_data_y_val_pred = np.zeros(plot_range)
to_plot_data_y_test_pred = np.zeros(plot_range)

to_plot_data_y_val[:plot_range-1] = scaler.inverse_transform(data_y_val)[-plot_range+1:]
to_plot_data_y_val_pred[:plot_range-1] = scaler.inverse_transform(predicted_val)[-plot_range+1:]

to_plot_data_y_test_pred[plot_range-1] = scaler.inverse_transform(prediction)

to_plot_data_y_val = np.where(to_plot_data_y_val == 0, None, to_plot_data_y_val)
to_plot_data_y_val_pred = np.where(to_plot_data_y_val_pred == 0, None, to_plot_data_y_val_pred)
to_plot_data_y_test_pred = np.where(to_plot_data_y_test_pred == 0, None, to_plot_data_y_test_pred)

# plot

plot_date_test = data_date[-plot_range+1:]
plot_date_test.append("tomorrow")

fig = figure(figsize=(25, 5), dpi=80)
fig.patch.set_facecolor((1.0, 1.0, 1.0))
plt.plot(plot_date_test, to_plot_data_y_val, label="Actual prices", marker=".", markersize=10, color=config["plots"]["color_actual"])
plt.plot(plot_date_test, to_plot_data_y_val_pred, label="Past predicted prices", marker=".", markersize=10, color=config["plots"]["color_pred_val"])
plt.plot(plot_date_test, to_plot_data_y_test_pred, label="Predicted price for next day", marker=".", markersize=20, color=config["plots"]["color_pred_test"])
plt.title("Predicted close price of the next trading day")
plt.grid(b=None, which='major', axis='y', linestyle='--')
plt.legend()
plt.show()

print("Predicted close price of the next trading day:", round(to_plot_data_y_test_pred[plot_range-1], 2))