방법 비교

	Single-cell RNA-seq differential expression	군집 분석
분야	생물정보학	통계학
계열	Process / pipeline	Latent structure
기원 연도	2013–2015 (first scRNA-seq DE tools; refined 2015–present)	1939–1967
창시자	Pioneered through Seurat (Satija lab) and scde (Kharchenko lab) frameworks, building on bulk RNA-seq DE foundations	Robert C. Tryon (early development); Ward (1963) for hierarchical; MacQueen (1967) for k-means
유형	Computational bioinformatics pipeline	Unsupervised classification / grouping
원전	Butler, A., Hoffman, P., Smibert, P., Papalexi, E., & Satija, R. (2018). Integrating single-cell transcriptomic data across different conditions, technologies, and species. Nature Biotechnology, 36(5), 411–420.	Everitt, B. S., Landau, S., Leese, M. & Stahl, D. (2011). Cluster Analysis (5th ed.). Wiley. ISBN: 978-0470749913
별칭	scRNA-seq DE, single-cell differential expression, scDE, cell-level differential expression analysis	clustering, unsupervised classification, data clustering, numerical taxonomy
관련	5	5
요약	Single-cell RNA-seq differential expression (scRNA-seq DE) analysis identifies genes whose expression levels differ significantly between defined groups of individual cells — such as cell types, disease states, or treatment conditions. Unlike bulk RNA-seq, which averages signals across millions of cells, scRNA-seq DE operates on the transcriptome of each individual cell, enabling fine-grained characterization of cell-population-specific gene regulation and heterogeneity within seemingly homogeneous tissue.	Cluster analysis is a family of unsupervised multivariate techniques that partition a set of objects or observations into internally homogeneous, mutually distinct groups — clusters — based on measured characteristics, without any prior knowledge of group membership. It is widely used in market segmentation, bioinformatics, psychology, and social science to reveal natural groupings in data.