Hi guys,

I started combining pre-trained ResNet50 and an MLP in a Siamese Structure and am running into a problem with dimensions. The idea is that two images with each a price go through the network and it returns a probability of chosing the first image. My images are now of size [224,224,3] as they should be for ResNet and I removed the last layer which should give me a vector of 2048 features. When I try to run the following code to test is the model has an output

```
for epoch in range(num_epochs):
for i, (image1, image2, y_label, price1, price2) in enumerate(train_loader):
# Get data to cuda
image1 = image1.to(device=device)
image2 = image2.to(device=device)
y_label = y_label.to(device=device)
price1 = price1.to(device=device)
price2 = price2.to(device=device)
#print(image1.shape)
# Forward
prob = model(image1, price1, image2, price2)
print(prob)
```

I get the following error: RuntimeError: mat1 dim 1 must match mat2 dim 0

this is my model

```
model = models.resnet50(pretrained=True)
newmodel = torch.nn.Sequential(*(list(model.children())[:-1]))
pretrained = newmodel
class NN(nn.Module):
def __init__(self, my_pretrained_model):
super(NN, self).__init__()
self.pretrained = my_pretrained_model
self.MLP = nn.Sequential(
nn.Linear(2048, 124),
nn.ReLU(),
nn.Linear(124, 1)
)
self.last_node = nn.Linear(2,1)
def forward_once(self, x, y):
x = self.pretrained(x)
x = self.MLP(x)
torch.cat((x,y))
x = self.last_node(x,y)
return x
def forward(self, image1, price1, image2, price2):
output1 = self.forward_once(image1, price1)
output2 = self.forward_once(image2, price2)
prob = 1/(1 + math.exp(output2-output1)) # probability of choosing first image
return prob
```

Any help is appreciated!

Best regards