What does the edge feature stand for?

[Seojin-Kim]

Hello.

I'm doing an SMP experiment, and I found that the edge feature dimension is 4.

However, I couldn't figure out what each element stands for.

Could you give me some instruction about the features of edges of molecule?

Thank you.

[martinvoegele]

The data set itself does not come with explicit edge features, so it depends on the algorithm you are using.
Some of them use one-hot encoding with dimension 4 for the type of the chemical bond (single, double, triple, aromatic).