ASTFunction: A specified function call as an ASTNode

In spgarbet/tg: The Grammar of Tables

A specified function call as an ASTNode

Description

A specified function call as an ASTNode

A specified function call as an ASTNode

Format

R6Class object.

Super class

tangram::ASTNode -> ASTFunction

Public fields

r_expr

A string containing the raw r expression from inside the parenthesis

data

Data stored as a result of reduction

Methods

Public methods

• ASTFunction$new()

• ASTFunction$factors()

• ASTFunction$name()

• ASTFunction$string()

• ASTFunction$reduce()

• ASTFunction$clone()

Inherited methods

• tangram::ASTNode$distribute()
• tangram::ASTNode$set_format()
• tangram::ASTNode$terms()

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Method new()

Construct a node representing a function call

Usage

ASTFunction$new(value, r_expr)

Arguments

value

(character) The name of the function call

r_expr

Any r expression to be evaluated inside the call

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Method factors()

Returns all terminal nodes, this is a terminal node so returns self

Usage

ASTFunction$factors()

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Method name()

Returns the function call as character

Usage

ASTFunction$name()

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Method string()

Returns a re-parsable representation of the node

Usage

ASTFunction$string()

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Method reduce()

Given a data.frame execute the function in that environment and associate the result as data.

Usage

ASTFunction$reduce(data)

Arguments

data

(data.frame) The data.frame to use as the enviroment for the function execution

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Method clone()

The objects of this class are cloneable with this method.

Usage

ASTFunction$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

ASTFunction$new("log", "x+2")$string()

spgarbet/tg documentation built on Feb. 21, 2023, 3:35 a.m.