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## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>"
)
## ----cake, echo = FALSE-------------------------------------------------------
library(ggplot2)
ggplot(mpg, aes(cty, hwy)) +
geom_point(aes(colour = displ)) +
geom_smooth(formula = y ~ x, method = "lm") +
scale_colour_viridis_c() +
facet_grid(year ~ drv) +
coord_fixed() +
theme_minimal() +
theme(panel.grid.minor = element_blank())
## ----overview_graphic, echo=FALSE---------------------------------------------
n <- 7
x <- outer(c(-2, 0, 2, 0), rep(1, n))
y <- outer(c(0, 1, 0, -1), seq(0, 2.309, length.out = n), FUN = `+`)
df <- data.frame(
x = as.vector(x),
y = as.vector(y),
group = as.vector(col(x))
)
ggplot(df, aes(x, y, group = group, fill = factor(group))) +
geom_polygon(alpha = 0.9) +
coord_equal() +
scale_y_continuous(
breaks = seq(0, 2.309, length.out = n),
labels = c("Data", "Mapping", "Layers", "Scales",
"Facets", "Coordinates", "Theme")
) +
scale_fill_manual(
values = c("#E69F00", "#56B4E9", "#009E73", "#F0E442",
"#0072B2", "#D55E00", "#CC79A7"),
guide = "none"
) +
theme_void() +
theme(axis.text.y = element_text(face = "bold", hjust = 1))
## ----example_data, fig.show='hide'--------------------------------------------
ggplot(data = mpg)
## ----example_mapping, fig.show='hide'-----------------------------------------
ggplot(mpg, mapping = aes(x = cty, y = hwy))
## ----example_layer, fig.show='hold'-------------------------------------------
ggplot(mpg, aes(cty, hwy)) +
# to create a scatterplot
geom_point() +
# to fit and overlay a loess trendline
geom_smooth(formula = y ~ x, method = "lm")
## ----example_scales-----------------------------------------------------------
ggplot(mpg, aes(cty, hwy, colour = class)) +
geom_point() +
scale_colour_viridis_d()
## ----example_facets-----------------------------------------------------------
ggplot(mpg, aes(cty, hwy)) +
geom_point() +
facet_grid(year ~ drv)
## ----example_coords-----------------------------------------------------------
ggplot(mpg, aes(cty, hwy)) +
geom_point() +
coord_fixed()
## ----example_theme------------------------------------------------------------
ggplot(mpg, aes(cty, hwy, colour = class)) +
geom_point() +
theme_minimal() +
theme(
legend.position = "top",
axis.line = element_line(linewidth = 0.75),
axis.line.x.bottom = element_line(colour = "blue")
)
## ----outro--------------------------------------------------------------------
ggplot(mpg, aes(cty, hwy)) +
geom_point(mapping = aes(colour = displ)) +
geom_smooth(formula = y ~ x, method = "lm") +
scale_colour_viridis_c() +
facet_grid(year ~ drv) +
coord_fixed() +
theme_minimal() +
theme(panel.grid.minor = element_blank())
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