- Is the amplitude (at a given frequency) constant?
- Vertical Axis: Amplitude
- Horizontal Axis: Time
- The amplitude is fixed at approximately 390
- There is a start-up effect
- There is a change in amplitude at around x = 160 (outlier?)
- NIST/SEMATECH Handbook Chapter:
Exploratory Data Analysis
- Granger and Hatanaka (1964), Spectral
Analysis of Economic Time Series,
Princeton University Press.