저는 pytorch의 기초를 배우고 있으며, 분류를 위해 IRIS 데이터 세트를 학습하기 위해 드롭 아웃이있는 간단한 4 계층 네이럴 네트워크를 만들려고합니다. 많은 자습서를 참조한 후에이 코드를 작성했습니다.numpy 데이터 및 배치 크기로 pytorch 모델을 교육하는 방법은 무엇입니까?
import pandas as pd
from sklearn.datasets import load_iris
import torch
from torch.autograd import Variable
epochs=300
batch_size=20
lr=0.01
#loading data as numpy array
data = load_iris()
X=data.data
y=pd.get_dummies(data.target).values
#convert to tensor
X= Variable(torch.from_numpy(X), requires_grad=False)
y=Variable(torch.from_numpy(y), requires_grad=False)
print(X.size(),y.size())
#neural net model
model = torch.nn.Sequential(
torch.nn.Linear(4, 10),
torch.nn.ReLU(),
torch.nn.Dropout(),
torch.nn.Linear(10, 5),
torch.nn.ReLU(),
torch.nn.Dropout(),
torch.nn.Linear(5, 3),
torch.nn.Softmax()
)
print(model)
# Loss and Optimizer
optimizer = torch.optim.Adam(model.parameters(), lr=lr)
loss_func = torch.nn.CrossEntropyLoss()
for i in range(epochs):
# Forward pass
y_pred = model(X)
# Compute and print loss.
loss = loss_func(y_pred, y)
print(i, loss.data[0])
# Before the backward pass, use the optimizer object to zero all of the
# gradients for the variables it will update (which are the learnable weights
# of the model)
optimizer.zero_grad()
# Backward pass
loss.backward()
# Calling the step function on an Optimizer makes an update to its parameters
optimizer.step()
현재 내가 직면 한 두 가지 문제가 있습니다.
- 배치 크기를
20
으로 설정하고 싶습니다. 어떻게해야합니까? 이 단계y_pred = model(X)
에서 - 는이 에러를 나타내는
오류
TypeError: addmm_ received an invalid combination of arguments - got (int, int, torch.DoubleTensor, torch.FloatTensor), but expected one of:
* (torch.DoubleTensor mat1, torch.DoubleTensor mat2)
* (torch.SparseDoubleTensor mat1, torch.DoubleTensor mat2)
* (float beta, torch.DoubleTensor mat1, torch.DoubleTensor mat2)
* (float alpha, torch.DoubleTensor mat1, torch.DoubleTensor mat2)
* (float beta, torch.SparseDoubleTensor mat1, torch.DoubleTensor mat2)
* (float alpha, torch.SparseDoubleTensor mat1, torch.DoubleTensor mat2)
* (float beta, float alpha, torch.DoubleTensor mat1, torch.DoubleTensor mat2)
didn't match because some of the arguments have invalid types: (int, int, torch.DoubleTensor, !torch.FloatTensor!)
* (float beta, float alpha, torch.SparseDoubleTensor mat1, torch.DoubleTensor mat2)
didn't match because some of the arguments have invalid types: (int, int, !torch.DoubleTensor!, !torch.FloatTensor!)
문제를 해결합니까? – jdhao
죄송합니다.이 문제를 해결할 수 없습니다. 해결 방법이 있다면 – Eka