detect_venn_datatype: Detect the input data format for Venn diagram processing

In plotthis: High-Level Plotting Built Upon 'ggplot2' and Other Plotting Packages

Detect the input data format for Venn diagram processing

Description

Examines the structure of data and determines which of the four supported formats it conforms to:

• "long" — a data frame with one row per element-set pair.

• "wide" — a data frame with logical/0-1 columns per set.

• "list" — a named list of element vectors per set.

• "venn" — a pre-computed VennPlotData object.

Usage

detect_venn_datatype(data, group_by = NULL, id_by = NULL)

Arguments

data	A data frame, a named list, or a VennPlotData object. Data frames are classified as "long" when a single non-NULL group_by is provided, or "wide" when group_by has two or more columns or is NULL.
group_by	A character string specifying the column name(s) identifying the set membership. A single non-NULL column indicates long format. Two or more columns, or NULL, indicate wide format.
id_by	A character string specifying the column name that identifies individual elements. Required when group_by is a single column and data is a data frame. Ignored for other input types.

Value

A character string indicating the detected data format: "long", "wide", "list", or "venn". Stops with an error if the data does not match any recognised type.

plotthis documentation built on July 9, 2026, 5:07 p.m.