82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
import torch
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import torch.nn as nn
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import torch.optim as optim
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import torch.nn.functional as F
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from sklearn.model_selection import train_test_split
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from sklearn.metrics import accuracy_score
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from sklearn.preprocessing import StandardScaler
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import pandas as pd
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import numpy as np
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# Wczytanie danych
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data = pd.read_csv("Sales.csv")
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# Przygotowanie danych
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data["Profit_Category"] = pd.cut(data["Profit"], bins=[-np.inf, 500, 1000, np.inf], labels=[0, 1, 2])
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bike = data.loc[:, ['Customer_Age', 'Customer_Gender', 'Country','State', 'Product_Category', 'Sub_Category', 'Profit_Category']]
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bikes = pd.get_dummies(bike, columns=['Country', 'State', 'Product_Category', 'Sub_Category', 'Customer_Gender'])
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X = bikes.drop('Profit_Category', axis=1).values
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y = bikes['Profit_Category'].values
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X_train, X_test, y_train, y_test=train_test_split(X,y,test_size=0.2,random_state=0)
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scaler = StandardScaler()
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X = scaler.fit_transform(X)
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#### Tworzenie tensorów
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X_train = X_train.astype(np.float32)
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X_test = X_test.astype(np.float32)
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y_train = y_train.astype(np.float32)
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y_test = y_test.astype(np.float32)
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X_train=torch.FloatTensor(X_train)
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X_test=torch.FloatTensor(X_test)
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y_train=torch.LongTensor(y_train)
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y_test=torch.LongTensor(y_test)
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#### Model
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class ANN_Model(nn.Module):
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def __init__(self,input_features=82,hidden1=20,hidden2=20,out_features=3):
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super().__init__()
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self.f_connected1=nn.Linear(input_features,hidden1)
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self.f_connected2=nn.Linear(hidden1,hidden2)
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self.out=nn.Linear(hidden2,out_features)
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def forward(self, x):
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x=F.relu(self.f_connected1(x))
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x=F.relu(self.f_connected2(x))
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x=self.out(x)
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return x
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torch.manual_seed(20)
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model=ANN_Model()
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model.parameters
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def calculate_accuracy(model, X, y):
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with torch.no_grad():
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outputs = model(X)
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_, predicted = torch.max(outputs.data, 1)
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total = y.size(0)
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correct = (predicted == y).sum().item()
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accuracy = correct / total * 100
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return accuracy
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loss_function = nn.CrossEntropyLoss()
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optimizer = torch.optim.Adam(model.parameters(), lr=0.01)
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epochs = 100
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final_losses = []
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accuracy_list = []
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for i in range(epochs):
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i = i + 1
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y_pred = model(X_train)
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loss = loss_function(y_pred, y_train)
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final_losses.append(loss)
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train_accuracy = calculate_accuracy(model, X_train, y_train)
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test_accuracy = calculate_accuracy(model, X_test, y_test)
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print(f"Epoch: {i}, Loss: {loss.item()}, Train Accuracy: {train_accuracy}%, Test Accuracy: {test_accuracy}%")
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optimizer.zero_grad()
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loss.backward()
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optimizer.step()
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torch.save(model,"classificationn_model.pt")
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