expand_wildcards: Expand c-squares with wildcards to all matching c-squares

In csquares: Concise Spatial Query and Representation System (c-Squares)

Expand c-squares with wildcards to all matching c-squares

Description

The asterisk (*) can be used as a wildcard, for a compact notation of csquares. expand_wildcards will replace all wild cards with valid combinations of values and expands the compact notation to an explicit notation without wildcards. Check out vignette("wildcards") for more details.

Usage

expand_wildcards(x, csquares, ...)

Arguments

x	A character string containing csquares codes with wildcards (asterisk character); or a data.frame that contains a column with csquares codes with wildcards
csquares	When x is data.frame this argument should specify the column name that contains the csquares codes with wildcards.
...	ignored

Value

Returns a csquares object with full notation

Author(s)

Pepijn de Vries

Examples

expand_wildcards("1000:*")
expand_wildcards("1000:***")
expand_wildcards("1000:1**")
expand_wildcards("1000:***:*")
expand_wildcards(c("1000:*", "1000:***", "1000:1**", "1000:***:*"))

expand_wildcards(data.frame(csq = "1000:*", foo = "bar"), csquares = "csq")

csquares documentation built on Sept. 11, 2024, 7:21 p.m.