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This is a margin figure the knitr chunk option to create figure in the margin is fig.margin = TRUE:

MPG vs horsepower, colored by transmission.

library(ggplot2)
mtcars2 <- mtcars
mtcars2$am <- factor(
  mtcars$am, labels = c('automatic', 'manual')
)
ggplot(mtcars2, aes(hp, mpg, color = am)) +
  geom_point() + geom_smooth() +
  theme(legend.position = 'bottom')

Instead of using the margin you may want to use the full width this is acheivable by using fig.fullwidth = TRUE in the code chunk option:

ggplot(diamonds, aes(carat, price)) + geom_smooth() +
  facet_grid(~ cut)

block quote: Some days are just bad days, that’s all. You have to experience sadness to know happiness, and I remind myself that not every day is going to be a good day, that’s just the way it is!

inline equation: \(A = \pi*r^{2}\)

First two plots with the code chunk option of fig.show = ‘hold’:

p <- ggplot(mtcars2, aes(hp, mpg, color = am)) +
  geom_point()
p
p + geom_smooth()

Then two plots with the code chunk option of fig.show = ‘asis’:

p <- ggplot(mtcars2, aes(hp, mpg, color = am)) +
  geom_point()
p

p + geom_smooth()

two plots with a table

p
p + geom_smooth(method = 'lm')
knitr::kable(head(iris, 15))

Sepal.Length	Sepal.Width	Petal.Length	Petal.Width	Species
5.1	3.5	1.4	0.2	setosa
4.9	3.0	1.4	0.2	setosa
4.7	3.2	1.3	0.2	setosa
4.6	3.1	1.5	0.2	setosa
5.0	3.6	1.4	0.2	setosa
5.4	3.9	1.7	0.4	setosa
4.6	3.4	1.4	0.3	setosa
5.0	3.4	1.5	0.2	setosa
4.4	2.9	1.4	0.2	setosa
4.9	3.1	1.5	0.1	setosa
5.4	3.7	1.5	0.2	setosa
4.8	3.4	1.6	0.2	setosa
4.8	3.0	1.4	0.1	setosa
4.3	3.0	1.1	0.1	setosa
5.8	4.0	1.2	0.2	setosa

two plots with a table

p

knitr::kable(head(iris, 12))

Sepal.Length	Sepal.Width	Petal.Length	Petal.Width	Species
5.1	3.5	1.4	0.2	setosa
4.9	3.0	1.4	0.2	setosa
4.7	3.2	1.3	0.2	setosa
4.6	3.1	1.5	0.2	setosa
5.0	3.6	1.4	0.2	setosa
5.4	3.9	1.7	0.4	setosa
4.6	3.4	1.4	0.3	setosa
5.0	3.4	1.5	0.2	setosa
4.4	2.9	1.4	0.2	setosa
4.9	3.1	1.5	0.1	setosa
5.4	3.7	1.5	0.2	setosa
4.8	3.4	1.6	0.2	setosa

second plot

p + geom_smooth(method = 'lm')

knitr::kable(head(iris, 5))

Sepal.Length	Sepal.Width	Petal.Length	Petal.Width	Species
5.1	3.5	1.4	0.2	setosa
4.9	3.0	1.4	0.2	setosa
4.7	3.2	1.3	0.2	setosa
4.6	3.1	1.5	0.2	setosa
5.0	3.6	1.4	0.2	setosa