Solved: I made mistake from other code.

Error from

```
conv1.weight=nn.Parameter(a.float().unsqueeze(0).unsqueeze(0))
# RuntimeError: Given groups=1, weight of size [1, 1, 3, 3], expected input[2, 3, 250, 250] to have 1 channels, but got 3 channels instead
```

can be resolved by

```
conv1.weight=nn.Parameter(a.float().unsqueeze(0).unsqueeze(0).repeat(1,3,1,1))
```

Hi, I have torch.Size([2, 3, 250, 250]) image

And I want to use following 2 custom sobel filters

```
a=torch.Tensor(
[[1,0,-1],
[2,0,-2],
[1,0,-1]]).cuda()
b=torch.Tensor(
[[1,2,1],
[0,0,0],
[-1,-2,-1]]).cuda()
print("ten",ten.shape)
# one_b_gt_imgs torch.Size([2, 3, 250, 250])
conv1=nn.Conv2d(3,3,kernel_size=3,stride=1,padding=1,bias=False)
# But I got following errors
# It looks like it's because kernel depth is not 3
conv1.weight=nn.Parameter(a.float().unsqueeze(0).unsqueeze(0))
# RuntimeError: Given groups=1, weight of size [1, 1, 3, 3], expected input[2, 3, 250, 250] to have 1 channels, but got 3 channels instead
# So, I used repeat()
# And I checked
that "a.float().unsqueeze(0).unsqueeze(0).repeat(1,3,1,1)" converts tensor shape into (1,3,3,3)
conv1.weight=nn.Parameter(a.float().unsqueeze(0).unsqueeze(0).repeat(1,3,1,1))
# But I still have error and weight size is (1,1,3,3)
# RuntimeError: Given groups=1, weight of size [1, 1, 3, 3], expected input[2, 3, 250, 250] to have 1 channels, but got 3 channels instead
G_x=conv1(ten)
```

How to fix this?