var_grid

The function creates a tibble with two columns, <code>xvar</code> and <code>yvar</code>, whose
rows enumerate all combinations of column names specified in the <code>xvars</code>
and <code>yvars</code> argument. The column names to create the combinations from are
specified using a tidyselect expression (see
<a href="https://tidyselect.r-lib.org/articles/syntax.html">tidyselect syntax</a>).

Extensible framework for
subgroup discovery (Atzmueller (2015) <doi:10.1002/widm.1144>),
contrast patterns (Chen (2022) <doi:10.48550/arXiv.2209.13556>),
emerging patterns (Dong (1999) <doi:10.1145/312129.312191>) and
association rules (Agrawal (1994) <https://www.vldb.org/conf/1994/P487.PDF>).
Both crisp (binary) and fuzzy data are supported.
It generates conditions in the form of elementary conjunctions, evaluates
them on a dataset and checks the induced sub-data for interesting statistical
properties. Currently, the package searches for implicative association rules
and conditional correlations (Hájek (1978) <doi:10.1007/978-3-642-66943-9>).
A user-defined function may be defined to evaluate on each generated
condition to search for custom patterns.

Michal Burda

nuggets

Extensible Data Pattern Searching Framework

var_grid function

<dl><dt>x</dt>
<dd>either a data frame or a matrix</dd>
<dt>xvars</dt>
<dd>a tidyselect expression (see
<a href="https://tidyselect.r-lib.org/articles/syntax.html">tidyselect syntax</a>)
specifying the columns of <code>x</code>, whose names will be used as a domain for
combinations use at the first place (xvar)</dd>
<dt>yvars</dt>
<dd>a tidyselect expression (see
<a href="https://tidyselect.r-lib.org/articles/syntax.html">tidyselect syntax</a>)
specifying the columns of <code>x</code>, whose names will be used as a domain for
combinations use at the second place (yvar)</dd></dl>

Arguments

Author

The function creates a tibble with two columns, <code>xvar</code> and <code>yvar</code>, whose
rows enumerate all combinations of column names specified in the <code>xvars</code>
and <code>yvars</code> argument. The column names to create the combinations from are
specified using a tidyselect expression (see
<a href='https://tidyselect.r-lib.org/articles/syntax.html'>tidyselect syntax</a>).

Create a tibble of combinations of xvar/yvar variable pairs. — var_grid

<dl>

<dt>x</dt>
<dd>either a data frame or a matrix</dd>


<dt>xvars</dt>
<dd>a tidyselect expression (see
<a href='https://tidyselect.r-lib.org/articles/syntax.html'>tidyselect syntax</a>)
specifying the columns of <code>x</code>, whose names will be used as a domain for
combinations use at the first place (xvar)</dd>


<dt>yvars</dt>
<dd>a tidyselect expression (see
<a href='https://tidyselect.r-lib.org/articles/syntax.html'>tidyselect syntax</a>)
specifying the columns of <code>x</code>, whose names will be used as a domain for
combinations use at the second place (yvar)</dd>

</dl>

var_grid: Create a tibble of combinations of xvar/yvar variable pairs.

Description

Usage

Value

Arguments

Author

Examples