Which one is correct? observed in or observed from

It may depend on context, but you probably want "something is observed in U.S. data".

CJ

Thanks CJ.

Can you give me an example in which condition I should use observed from?

Thanks.

Zhe YangCan you give me an example in which condition I should use observed from?

Not with "data". Nothing I can think of. However, in other contexts it's possible.

The tigers were observed from a safe distance.

CJ

CalifJimThe tigers were observed from a safe distance.

Can I understand it in this way.

observed in + concrete noun ,like countries, locuation, eg U.S., U.K, a company and data, etc.
observed in+ abstract noun ,like a distance, space.

Am I right?

Thanks

Zhe YangCalifJimThe tigers were observed from a safe distance.Can I understand it in this way.observed in + concrete noun ,like countries, locuation, eg U.S., U.K, a company and data, etc.observed in ,like a distance, space.Am I right?Thanks

It's that "observe" stands alone. It doesn't really form combinations with prepositions. The preposition is chosen on

Got it. Thanks