Intro to Time series Flashcards
1
Q
Why cant we treat time like 1-d space
A
Time has a derection, causality cannot involve the future
2
Q
Why are time series difficult
A
Data not at regular intervals, consider time discrete Delta t rather than continuous
3
Q
Time series trends
A
More common than spatial trends
Economics is usually exponnetial trends
4
Q
Prediction in time
A
Almost always forecasting
5
Q
Seasonality
A
Data is often annually correlated between one another, temp etc
6
Q
How to model seasonality
A
We use Fourier terms
Look at equation sheet
