# Geom❤️

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

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

This particular ❤️ math pilfered this morning from @dmarcelinobr:

```
library(ggplot2)
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,])
layer(
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)) +
theme(plot.margin=margin(30,30,30,30))
}
```

To

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