groepgewijze

Groepgewijze is a Dutch adjective describing procedures, calculations, or analyses that are carried out for each group within a dataset, rather than for individuals or the dataset as a whole. In statistics, data analysis, and related fields, a groepgewijze approach computes summaries or performs tests separately for groups defined by a grouping variable. This contrasts with pooled analyses that ignore group structure.

Etymology and usage context: the word combines groep (group) with geweijze, from wijze (manner, way), with ge- forming an attributive adjective. The standard English equivalents are groupwise or per-group, used to convey the same idea of applying methods within each group. The term is common in technical Dutch prose across mathematics, econometrics, and data science, where grouping is a central concept.

Applications: in programming and data analysis, groepgewijze processing corresponds to workflows that first define groups (for example by a key or category) and then apply calculations within each group, such as calculating per-group means, variances, or regression coefficients. In SQL or data-frame tools, this aligns with operations performed after a group-by step.

Translations and related terms: English usage often employs groupwise or per-group analyses and operations. Related Dutch terminology includes groepsequentiële or groepgebaseerde constructs in specific contexts, though groepgewijze remains the standard form for describing per-group methods.

See also: group-by, per-group analysis, groupwise operations.