Compare trend with speicifc time value

[jdewitte]

I would like to compare the trend values with a specific value in time. Can I retrieve the value related to a specific point in time?

For instance over a period of 20 years the fraction of Values related to the Value at time = 10 or: F(t) =V(t)/V(10).?

Is there a Vensim function to do this?

[Administrator]

You can use the SAMPLE IF TRUE function to store the value at a specific time.

[tomfid]

Vensim is causal, i.e. no peeking into the future, so strictly you can only see V(10) from time 10+.