A1Benchmark: Yahoo Webscope S5 – A1 Benchmark (Real)

In harbinger: A Unified Time Series Event Detection Framework

Yahoo Webscope S5 – A1 Benchmark (Real)

Description

Part of the Yahoo Webscope S5 labeled anomaly detection dataset. A1 contains real-world time series with binary anomaly labels. Useful for evaluating anomaly detection methods on real traffic-like data. Labels available: Yes.

Usage

data(A1Benchmark)

Format

A list of time series.

Details

This package ships a mini version of the dataset. Use loadfulldata() to download and load the full dataset from the URL stored in attr(url).

Source

\Sexpr[results=rd]{tools:::Rd_expr_doi("10.1371/journal.pone.0262463")}

References

Yoshihara K, Takahashi K (2022) A simple method for unsupervised anomaly detection: An application to Web time series data. PLoS ONE 17(1).

Chandola, V., Banerjee, A., & Kumar, V. (2009). Anomaly detection: A survey. ACM Computing Surveys, 41(3), 1–58.

Examples

data(A1Benchmark)
# Access the first series and visualize
s <- A1Benchmark[[1]]
plot(ts(s$value), main = names(A1Benchmark)[1], ylab = "value")
mean(s$event)  # proportion of labeled anomalies

harbinger documentation built on Feb. 11, 2026, 9:06 a.m.