Find All Names in an Expression

Usage

all.names(expr, functions = T,
        max.names = 200, unique = F)
all.vars(expr, functions = F,
        max.names = 200, unique = T)

Arguments

expr an expression or call from which the names are to be extracted.
functions a logical value indicating whether function names should be included in the result.
max.names the maximum number of names to be returned.
unique a logical value which indicates whether duplicate names should be removed from the value.

Value

These functions return a character vector containing all the names which occur in an expression or call. These functions differ only in the default values for their arguments.

Examples

all.names(expression(sin(x+y)))
all.vars(expression(sin(x+y)))


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