params <-
list(family = "red", preset = "study")

## ----setup, include=FALSE-----------------------------------------------------
knitr::opts_chunk$set(
  collapse = TRUE, comment = "#>", fig.align = "center", fig.retina = 2,
  out.width = "100%", fig.width = 7, fig.asp = 0.618, message = FALSE, warning = FALSE
)
set.seed(123)
oldopt <- options(pillar.sigfig = 7, width = 80)
library(ggplot2)
if (requireNamespace("albersdown", quietly = TRUE)) {
  oldtheme <- ggplot2::theme_set(albersdown::theme_albers(
    family = params$family,
    preset = params$preset
  ))
}

## ----albers-family, echo=FALSE, results='asis'--------------------------------
cat(sprintf('<script>document.addEventListener("DOMContentLoaded",function(){document.body.classList.add("palette-%s");});</script>', params$family))

## ----albers-preset, echo=FALSE, results='asis'--------------------------------
cat(sprintf('<script>document.addEventListener("DOMContentLoaded",function(){document.body.classList.add("preset-%s");});</script>', params$preset))

## -----------------------------------------------------------------------------
summary(mtcars$mpg)

## -----------------------------------------------------------------------------
mtcars |>
  ggplot(aes(wt, mpg, color = factor(cyl))) +
  geom_point(size = 2.2) +
  labs(title = "Fuel efficiency vs. weight",
       subtitle = "Albers theme demo", x = "Weight (1000 lbs)", y = "MPG")

## ----cleanup, include=FALSE---------------------------------------------------
options(oldopt)
if (exists("oldtheme")) ggplot2::theme_set(oldtheme)