Check if formula
Check for simple formula
Extract simple part from formula
.is.formula(x).is.simple.formula(x)
.simple.part(x)
.make.data.frame(x)
.merge_data_frames(a, b)
.squash_names(object, sep = ":")
.do.safe.call(what, args, quote = FALSE, envir = parent.frame(), ...)
TRUE for a formula, FALSE otherwise, even if evaluation throws an error
TRUE if formula has no left-hand side or a simple right-hand side
(e.g., NULL, ., 1, or 0)
simple part of formula or NULL if formula is not simple
a data frame
a data frame
a character vector
The result of the (evaluated) function call.
object to be converted
a data frame
a data frame
an object
a character
either a function or a non-empty character string naming the function to be called.
a list of arguments to the function call. The names attribute of args gives the argument names.
a logical value indicating whether to quote the arguments.
an environment within which to evaluate the call. This will be most useful if what is a character string and the arguments are symbols or quoted expressions.
.make.data.frame converts things to a data frame
.merge_data_frames is a wrapper around merge
.squash_names squashes names of a data frame into a single string
.do.safe.call avoids conflicts between named arguments and ... by taking named arguments
preferentially.