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Create Legend in ggplot Plot in R (2 Examples) | How to Add Legends to Graphic | ggplot2 Package

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R code of this video:
y = rnorm(100),
group = factor(round(runif(100, 1, 5))))
head(data) # Inspect data
library("ggplot2") # Load ggplot2 library
ggplot(data, aes(x, y)) + # ggplot without legend
geom_point(col = data$group)
ggplot(data, aes(x, y, col = group)) + # ggplot with legend
geom_point()
ggplot(data, aes(x, y)) + # Specifying legend in geom
geom_point(aes(col = group))
y = rnorm(100),
group = factor(round(runif(100, 1, 5))))
head(data) # Inspect data
library("ggplot2") # Load ggplot2 library
ggplot(data, aes(x, y)) + # ggplot without legend
geom_point(col = data$group)
ggplot(data, aes(x, y, col = group)) + # ggplot with legend
geom_point()
ggplot(data, aes(x, y)) + # Specifying legend in geom
geom_point(aes(col = group))
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