Add Values to Heatmap in R (Example) | How to Draw Numbers in Cells | ggplot2 & geom_text() Functio

Описание

How to draw a heatmap with values in the R programming language. More details: https://statisticsglobe.com/add-values-heatmap-r
R code of this video:

set.seed(328576) # Create example data
data ＜- data.frame(group1 = rep(LETTERS[1:4], each = 10),
group2 = letters[1:10],
values = round(rnorm(40), 2))
head(data) # Print head of example data

install.packages("ggplot2") # Install & load ggplot2
library("ggplot2")

ggp ＜- ggplot(data, aes(group1, group2)) + # Create default ggplot2 heatmap
geom_tile(aes(fill = values))
ggp # Draw default ggplot2 heatmap

ggp + # Add values to heatmap
geom_text(aes(label = values))

ggp + # Add values & modify color
geom_text(aes(label = values)) +
scale_fill_gradient(low = "white", high = "#1b98e0")

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