express: Graphs from R Expressions

In gmega/expRess: Simple Expression Graphs in R.

Description

Creates a plottable (DiagrammeR) expression graph from an unevaluated R expression. By default, merges the innermost symbols (input variables) with the same label into common nodes, similarly to the kind of expression graph one would see in a neural network.

Usage

express(expr, merge = TRUE, label_formatter = default_label_formatter)

Arguments

expr	an R expression. Typically a composite function (e.g. 'f(g(x), h(x))').
merge	if set to 'TRUE' (the default), merges input variables with the same name into the same graph node.
label_formatter	a function which takes a character vector and returns a character vector.

Value

a DiagrammeR graph corresponding to the supplied expression.

Examples

library(magrittr)
g <- express(f_1(f_2(f_3(x_1, x_2), x_3), f_1(f_4(f_5(x_1), f_6(x_2), x_4))))
g %>% DiagrammeR::render_graph()

gmega/expRess documentation built on June 12, 2020, 1 a.m.