create_s3_method: Template functions to generate basic S3 methods for new...

In rccmisc: Miscellaneous R Functions for Swedish Regional Cancer Centers

Description

create_s3_method creates a method that applies NextMethod but that also keeps additional attributes (such as class). create_s3_print creates a print method.

Usage

create_s3_method(generic = NULL, object = NULL)

create_s3_print(fun, ...)

Arguments

generic, object	as described for NextMethod
fun	Function to transform object before print (probably as.character, as.numeric or similair).
...	additional arguments passed to print method

Details

Don't forget to also create for example a data.frame method by

as.data.frame.xxx <- as.data.frame.vector

Value

S3-method.

Examples

a <- structure(1:10, class = c("b", "numeric"))
a[3] # Normal subsetting makes a loose its attributes
`[.b` <- create_s3_method("[")
print.b <- create_s3_print(as.numeric)
a[3] # attributes preserved even if we can't see them
str(a[3])

rccmisc documentation built on May 2, 2019, 2:48 p.m.