formula.tools: Utilities for Formulas, Expressions, Calls and Other Objects
モデル式オブジェクトなどのためのユーティリティ
- CRAN: http://cran.r-project.org/web/packages/formula.tools/index.html
- GitHub: https://github.com/decisionpatterns/formula.tools
> library(formula.tools)
Loading required package: operator.tools
operator.tools-1.6.3 - Copyright © 2017 Decision Patterns
formula.tools-1.6.1 - Copyright © 2017 Decision Patterns
バージョン: 1.6.1
| 関数名 | 概略 |
|---|---|
.invert.single |
Invert multiple elements of a multiple element object |
.is.one.sided |
Determine if an object is one- or two- sided. |
as.character.formula |
Converts a formula to character |
formula.parts |
Manipulate the component parts of formulas, expressions, calls, name/symbols and list and vectors of such objects. |
get.vars |
Get variable (names) from various R objects |
invert |
invert |
is.cat |
Work with variables as categorical or continuous |
op.type |
Get the operator type used in an call, formula, expression, etc. |
terms.call |
terms |
as.character.formula
モデル式を文字列に変換
> as.character( y ~ mx + b )
[1] "y ~ mx + b"
get.vars
モデル式で使われている変数名を取得
> get.vars( Species ~ ., iris )
[1] "Species" "Sepal.Length" "Sepal.Width" "Petal.Length"
[5] "Petal.Width"