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#' Custom theme "qcc" for the book industRial Data Science plots
#'
#' This theme provides a similar look and feel to the package \code{\link[qcc]{qcc}}
#' statistical process control charts (SPC) which have themselves a resemblance with
#' Minitab charts. This theme aims at providing a layout that is familiar to readers
#' of Minitab chart to help in reducing transition to R build reports and charts.
#'
#' @references
#' For a complete case study application refer to \url{https://j-ramalho.github.io/industRial/}
#'
#' @details
#' Apply this theme by adding it at the end of the code of any \code{\link[ggplot2]{ggplot}} chart.
#' It #' basically provides a grey background and some highlights to help reading key
#' process statistics such as the population mean.
#'
#' @param base_size font size, defaults to 12
#' @param base_family font family defaults to ""
#'
#' @return
#' This function returns an object of classes theme and gg from the ggplot2 package
#' @export
#'
#' @importFrom ggplot2 %+replace%
#' @examples
#' library(dplyr)
#' library(ggplot2)
#'
#' pet_delivery %>%
#' ggplot(aes(x = A)) +
#' geom_histogram(color = "grey", fill = "grey90") +
#' labs(title = "PET clothing case study",
#' subtitle = "Raw data plot",
#' x = "Treatment",
#' y = "Tensile strength [MPa]") +
#' theme_qcc()
theme_qcc <- function(base_size = 12, base_family = "") {
ggplot2::theme_grey(base_size = base_size, base_family = base_family) %+replace%
ggplot2::theme(
# Specify axis options
axis.line = ggplot2::element_blank(),
axis.text.x = ggplot2::element_text(size = base_size*0.8, color = "black", lineheight = 0.9),
axis.text.y = ggplot2::element_text(size = base_size*0.8, color = "black", lineheight = 0.9),
axis.ticks = ggplot2::element_line(color = "black", size = 0.2),
axis.title.x = ggplot2::element_text(size = base_size, color = "black", margin = ggplot2::margin(0, 10, 0, 0)),
axis.title.y = ggplot2::element_text(size = base_size, color = "black", angle = 90, margin = ggplot2::margin(0, 10, 0, 0)),
axis.ticks.length = ggplot2::unit(0.3, "lines"),
# Specify legend options
legend.background = ggplot2::element_rect(color = NA, fill = "white"),
legend.key = ggplot2::element_rect(color = "grey80", fill = "#ccffff"),
legend.key.size = ggplot2::unit(1.2, "lines"),
legend.key.height = NULL,
legend.key.width = NULL,
legend.text = ggplot2::element_text(size = base_size*0.8, color = "black"),
legend.title = ggplot2::element_text(size = base_size*0.8, face = "bold", hjust = 1, color = "black"),
legend.position = "right",
legend.text.align = NULL,
legend.title.align = NULL,
legend.direction = "vertical",
legend.box = NULL,
# Specify panel options
panel.background = ggplot2::element_rect(fill = "white", color = NA),
panel.border = ggplot2::element_rect(fill = NA, color = "grey50"),
panel.grid.major = ggplot2::element_line(color = NA),
panel.grid.minor = ggplot2::element_line(color = NA),
panel.margin = ggplot2::unit(0.5, "lines"),
# Specify facetting options
strip.background = ggplot2::element_rect(fill = "grey30", color = "grey10"),
strip.text.x = ggplot2::element_text(size = base_size*0.8, color = "black"),
strip.text.y = ggplot2::element_text(size = base_size*0.8, color = "black",angle = -90),
# Specify plot options
plot.background = ggplot2::element_rect(color = NA, fill = "grey90"),
plot.title = ggplot2::element_text(size = base_size*1.2, color = "black", hjust = 0),
# plot.margin = ggplot2::unit(rep(1, 4), "lines")
)
}
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