scidb.expression.value: Leaf value expression class

In Paradigm4/SciDBR: An R Interface to SciDB

Leaf value expression class

Description

Class representing a leaf value in an expression

Super class

scidb::scidb.expression -> scidb.expression.value

Methods

Public methods

• scidb.expression.value$new()

• scidb.expression.value$type()

• scidb.expression.value$raw()

• scidb.expression.value$symbols()

• scidb.expression.value$unary()

• scidb.expression.value$unary_composite()

• scidb.expression.value$substitute()

• scidb.expression.value$to_r()

• scidb.expression.value$to_afl()

• scidb.expression.value$clone()

---

Method new()

Wrap a raw R value in a scidb.expression object

Usage

scidb.expression.value$new(input)

Arguments

input

raw R value

---

Method type()

Returns the type of the expression as a string

Usage

scidb.expression.value$type()

Returns

"VALUE"

---

Method raw()

Returns the R value bound by this scidb.expression

Usage

scidb.expression.value$raw()

Returns

raw R value

---

Method symbols()

Returns the distinct symbols used in the expression

Usage

scidb.expression.value$symbols()

Returns

vector of symbol names

---

Method unary()

Whether or not the expression is a function of (at most) a single symbol

Usage

scidb.expression.value$unary()

Returns

a boolean value indicating unary or non-unary

---

Method unary_composite()

Whether or not the expression is unary or a boolean AND or OR of two other in-turn unary composite expressions

Usage

scidb.expression.value$unary_composite()

Returns

a boolean value indicating unary-composite or not

---

Method substitute()

Renames the symbols in the expression according to replacements in the arguments

Usage

scidb.expression.value$substitute(...)

Arguments

...

optional list of string replacements for each symbol in the expression

---

Method to_r()

Convert the expression to an R string, with optional symbol substitutions

Usage

scidb.expression.value$to_r(...)

Arguments

...

optional list of string replacements for each symbol in the expression

Returns

evaluation of this predicate as a single R string

---

Method to_afl()

Convert the expression to an AFL string, with optional symbol substitutions

Usage

scidb.expression.value$to_afl(...)

Arguments

...

optional list of string replacements for each symbol in the expression

Returns

evaluation of this predicate as a single AFL string

---

Method clone()

The objects of this class are cloneable with this method.

Usage

scidb.expression.value$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Paradigm4/SciDBR documentation built on Nov. 9, 2023, 4:58 a.m.