lt_merge: Merge Columns

In lt: Lightweight Tables via JSON Specs and JavaScript

Merge Columns

Description

Combine values from multiple columns into a single display column using a pattern. Source columns (all except the first) are hidden by default.

Usage

lt_merge(x, columns, pattern = NULL, hide = TRUE)

Arguments

x	An lt() object.
columns	Character vector of column names (or a one-sided formula). The first column is the target (receives merged content); the rest are sources.
pattern	A glue-style template using ⁠\{1\}⁠, ⁠\{2\}⁠, etc. to refer to columns by position. Wrap sections in ⁠<<⁠ and ⁠>>⁠ for conditional NA handling: "\{1\}<< (\{2\})>>" drops the wrapped portion when any referenced value is missing/empty. If NULL, columns are concatenated separated by spaces.
hide	If TRUE (default), source columns (all but the first) are automatically hidden.

Value

x with the merge recorded.

Examples

d = data.frame(stat = c("Mean", "SD"), value = c(4.2, 1.1), ci = c("(2.0, 6.4)", "(0.5, 1.7)"))
lt(d) |> lt_merge(~ value + ci, pattern = "{1} {2}")

lt documentation built on July 10, 2026, 1:09 a.m.