action issue

[venchi012]

Question

Hello, I would like to ask whether the action represents the delta between frames or an absolute value.

[Tavish9]

Hi, it depends.

• For openx dataset, the action is the delta value.
• For agibot dataset, it's absolute.
• For robomind dataset, it's absolute too.

[Tavish9]

Yes, very recommended.

[venchi012]

Thank you very much! I would also like to know how to generally obtain such detailed information. Since some corresponding papers do not mention it, can we only make a rough judgment based on the numerical range?

[Tavish9]

No, you cannot judge by the numerical range, you should check the official dataset for details.

[venchi012]

If I want to convert deltas to absolute values, is it correct to use the previous frame's state plus the action to get the current frame's absolute action? But what if the keys of the state and the action don't match up?

[Tavish9]

is it correct to use the previous frame's state plus the action to get the current frame's absolute action?

Yes, but "plus" means matrix multiplication sometimes. You should check whether it's + or $\times$.

But what if the keys of the state and the action don't match up?

Then you can't obtain other values, obviously.