Time-series Data Analysis
data: N pairs of (value, time)
N large: 50K
tasks
find standard day patterns
find how patterns distributed over year, week, season
find outliers from standard daily patterns
want overview first, then detail on demand
possibilities
predictive mathematical models
details lost, multiscale not addressed
scale-space approaches (wavelet, fourier, fractal)
hard to interpret, known scales lost
3D mountain: x hours, y value, z days
occlusion hides, perspective interferes
20