.plus_to_c

Given a formula like cyl + gear ~ sum_code, this function recursively
replaces the <code>+</code> operators with <code>c</code> so that the LHS becomes <code>c(cyl, gear)</code>.

internal

Quickly set and summarize contrasts for factors prior to regression analyses. Intended comparisons, baseline conditions, and intercepts can be explicitly set and documented without the user needing to directly manipulate matrices. Reviews and introductions for contrast coding are available in Brehm and Alday (2022)<doi:10.1016/j.jml.2022.104334> and Schad et al. (2020)<doi:10.1016/j.jml.2019.104038>.

Thomas Sostarics

contrastable

Consistent Contrast Coding for Factors

.plus_to_c function

<dl><dt>plus_expr</dt>
<dd>Expression</dd></dl>

Arguments

Handle + in formula LHS — .plus_to_c

<dl>

<dt>plus_expr</dt>
<dd>Expression</dd>

</dl>

.plus_to_c: Handle `+` in formula LHS

Description

Usage

Value

Arguments

Details