February 14, 2017

(This article was first published on R –, and kindly contributed to R-bloggers)

ggplot() +
  geom_heart() +
  coord_equal() +
  labs(title="Happy Valentine's Day") +

Presented without exposition (since it’s a silly Geom)

This particular ❤️ math pilfered this morning from @dmarcelinobr:


geom_heart <- function(..., colour = "#67001f", size = 0.5, fill = "#b2182b",
                       mul = 1.0, na.rm = FALSE, show.legend = NA, inherit.aes = TRUE) {
  data <- data.frame(t=seq(0, 10*pi, by=0.1))
  x <- function(t) 16*sin(t)^3
  y <- function(t) 13*cos(t) - 5*cos(2*t) - 2*cos(3*t) - cos(4*t)
  data$x <- x(data$t) * mul
  data$y <- y(data$t) * mul
  data <- rbind(data, data[1,])
    data = data,
    mapping = aes(x=x, y=y),
    stat = "identity",
    geom = ggplot2::GeomPolygon,
    position = "identity",
    show.legend = show.legend,
    inherit.aes = inherit.aes,
    params = list(
      na.rm = na.rm,
      size = size,
      colour = colour,
      fill = fill,

theme_heart <- function() {
  ggthemes::theme_map(base_family = "Zapfino") +
    theme(plot.title=element_text(hjust=0.5, size=28)) +

To leave a comment for the author, please follow the link and comment on their blog: R – offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.


Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)