.split_if_language

If something like <code>set_contrasts(df, var ~ sum_code())</code> then what's
extracted from the formula isn't the symbol for the function <code>sum_code</code> but
a language object. This can be converted to a list to extract the function
symbol and then any arguments provided in the parens. The latter needs to
be evaluated in the original environment, for example if
<code>set_contrasts(df, var ~ sum_code(scores=c(.1,.5,.6))</code> is called, the scores
list would not evaluate the <code>c(...)</code> call, yielding an error that the scores
argument isn't the right length (because it would be length 1, not 3).

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

.split_if_language function

<dl><dt>params</dt>
<dd>Parameters extracted from formula parsing</dd>
<dt>var_envir</dt>
<dd>Environment to evaluate expressions in</dd></dl>

Arguments

Split contrast function using parens — .split_if_language

<dl>

<dt>params</dt>
<dd>Parameters extracted from formula parsing</dd>


<dt>var_envir</dt>
<dd>Environment to evaluate expressions in</dd>

</dl>

.split_if_language: Split contrast function using parens

Description

Usage

Value

Arguments