This is a function inside its own environment. This enables a bunch of functions to be manipulated outside the package, even when they are called from function within the dendextend package.
TODO: describe options.
A new "warn" dendextend_options parameter. logical (FALSE). Should warning be issued?
dendextend_options(option, value)
a list with functions
dendextend_options("a")
#> NULL
dendextend_options("a", 1)
dendextend_options("a")
#> [1] 1
dendextend_options("a", NULL)
dendextend_options("a")
#> NULL
dendextend_options()
#> $warn
#> [1] FALSE
#>