Parse and validate linetype string to a vector

Parses a comma-separated string of linetypes and validates each element. Invalid linetypes are replaced with "solid" and a warning is issued.

Usage

string_to_linetypes(x)

Arguments

x

A string of linetypes delimited by commas, e.g. "solid, dashed, dotted". Valid linetypes are: "solid", "dashed", "dotted", "dotdash", "longdash", "twodash".

Value

A character vector of validated linetypes. If the input is "" or NULL, returns "solid".

Author

Jared Andrews

Examples

string_to_linetypes("solid, dashed, dotted")
#> [1] "solid"  "dashed" "dotted"
string_to_linetypes("")
#> [1] "solid"