# Technical Document Extraction: Time Series Anomaly Types This document contains a detailed extraction of data and visual information from a set of three time-series charts illustrating different types of anomalies. ## General Layout and Structure The image consists of three vertically stacked line charts. Each chart shares a common X-axis (time/index) ranging from **0 to approximately 1450** and a Y-axis (normalized value) ranging from **0.0 to 1.0**. * **Language:** English * **Data Series Color:** Black solid line * **Anomaly Indicator:** Light red/pink shaded vertical regions --- ## 1. Trend Shift Anomaly (Top Chart) ### Component Isolation * **Header:** Title "Trend Shift Anomaly" * **Y-Axis:** Markers at [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] * **X-Axis:** Markers at [0, 200, 400, 600, 800, 1000, 1200, 1400] ### Trend Analysis The data begins with a downward trend from 0.9 to 0.4. It then enters a sustained low-level period (the anomaly). Following the anomaly, the data exhibits a steady upward trend with high-frequency noise, eventually reaching a peak near 1.0 around index 1350. ### Anomaly Data * **Type:** Level/Trend Shift. * **Spatial Grounding:** A single large red shaded block. * **X-Range:** Approximately **index 230 to index 510**. * **Behavior:** During this window, the mean value of the series drops significantly to a range between 0.0 and 0.3, representing a "trough" anomaly compared to the surrounding global trend. --- ## 2. Seasonal Pattern Variation Anomaly (Middle Chart) ### Component Isolation * **Header:** Title "Seasonal Pattern Variation Anomaly" * **Y-Axis:** Markers at [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] * **X-Axis:** Markers at [0, 200, 400, 600, 800, 1000, 1200, 1400] ### Trend Analysis The series consists of intermittent "bursts" or pulses of activity separated by periods of zero value (flatline). The normal pattern appears to be a complex pulse reaching heights of 0.8 to 1.0. ### Anomaly Data * **Type:** Pattern Variation / Missing Cycle. * **Anomaly Region 1:** * **X-Range:** Approximately **index 20 to index 220**. * **Behavior:** The pulses in this region are significantly lower in amplitude (peaking around 0.4) and have a different frequency/shape compared to the standard pulses seen at index 400, 650, and 850. * **Anomaly Region 2:** * **X-Range:** Approximately **index 1060 to index 1090**. * **Behavior:** A very narrow shaded region where a pulse is truncated or fails to reach the expected height of the surrounding seasonal peaks. --- ## 3. Residual Outlier Anomaly (Bottom Chart) ### Component Isolation * **Header:** Title "Residual Outlier Anomaly" * **Y-Axis:** Markers at [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] * **X-Axis:** Markers at [0, 200, 400, 600, 800, 1000, 1200, 1400] ### Trend Analysis The series represents a stochastic or "noisy" signal centered roughly around a mean of 0.3. It fluctuates rapidly between 0.1 and 0.6 throughout the entire duration. ### Anomaly Data * **Type:** Point Outlier / Spike. * **Spatial Grounding:** A very thin vertical red line. * **X-Range:** Approximately **index 570 to index 580**. * **Behavior:** A single, sharp vertical spike where the value reaches **1.0**. This is a distinct deviation from the local variance, as the surrounding data points do not exceed 0.7 in that specific neighborhood. --- ## Summary Table of Extracted Data | Chart Title | Anomaly Type | Primary X-Range | Visual Characteristic | | :--- | :--- | :--- | :--- | | **Trend Shift Anomaly** | Level Shift | 230 - 510 | Sustained drop in mean value. | | **Seasonal Pattern Variation** | Shape/Frequency | 20 - 220; 1060 - 1090 | Low amplitude pulses; irregular timing. | | **Residual Outlier Anomaly** | Point Outlier | 570 - 580 | Single instantaneous spike to 1.0. |

# Technical Document: Anomaly Detection Analysis ## Graph 1: Trend Shift Anomaly - **Title**: Trend Shift Anomaly - **X-Axis**: Time (Sample Points) [0, 200, 400, 600, 800, 1000, 1200, 1400] - **Y-Axis**: Value [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] - **Key Observations**: - Data exhibits a gradual decline followed by a sharp drop. - **Anomaly Region**: Red-shaded area between **200–500** sample points. - Post-anomaly, values stabilize with minor fluctuations. ## Graph 2: Seasonal Pattern Variation Anomaly - **Title**: Seasonal Pattern Variation Anomaly - **X-Axis**: Time (Sample Points) [0, 200, 400, 600, 800, 1000, 1200, 1400] - **Y-Axis**: Value [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] - **Key Observations**: - High-frequency oscillations with periodic spikes. - **Anomaly Regions**: 1. Red-shaded area between **0–200** sample points (initial deviation). 2. Red-shaded area between **1000–1200** sample points (late-cycle deviation). ## Graph 3: Residual Outlier Anomaly - **Title**: Residual Outlier Anomaly - **X-Axis**: Time (Sample Points) [0, 200, 400, 600, 800, 1000, 1200, 1400] - **Y-Axis**: Value [0.0, 0.2, 0.4, 0.6, 0.8, 1.0] - **Key Observations**: - Consistent noise with sporadic outliers. - **Anomaly Region**: Red-shaded vertical line at **500–600** sample points (isolated spike). ### Cross-Graph Analysis - All graphs share identical axes (Time vs. Value) but represent distinct anomaly types. - Red shading consistently marks anomalous regions across all visualizations. - No legends or additional categorical labels are present in the image.