Getting value at specific time using metadata scripting

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Hi there,

I am still new with mango. Can somebody help me on how can I get a value at specific time (let say 8am) in metadata scripting. This is because I would like to calculate the use of (e.g. energy ) so far from that particular time. Is the below code is fine

return p1.lastValue - p1.pointValueAt(8)

Have you read https://docs-v3.mango-os.com/about-mango-java-script ?

Look at Statistical objects section. Hint, there is a delta in statistical object.