Spectral Density Estimation: Analysing the Frequency Domain of a Time Series to Identify Hidden Cycles
When you listen to a symphony, every instrument contributes its unique rhythm and frequency to the overall sound. Similarly, a time series—whether it represents stock prices, heartbeats, or website traffic—contains multiple hidden frequencies that form a complex melody of data. Spectral density estimation is the process of uncovering these hidden cycles, allowing data scientists to…