knitr::opts_chunk$set(echo = TRUE)

options(repos = c(CRAN = "https://cloud.r-project.org/"))

data(trees)


Arboles <- subset(trees, Height >= 70 & Height <= 80 & Girth < 13)


head(Arboles)
##    Girth Height Volume
## 1    8.3     70   10.3
## 4   10.5     72   16.4
## 8   11.0     75   18.2
## 9   11.1     80   22.6
## 10  11.2     75   19.9
## 11  11.3     79   24.2
library(tree)


colors <- ifelse(trees$Height >= 70 & trees$Height <= 80 & trees$Girth < 13, "green", "black")


plot(trees$Girth, trees$Height,
     col = colors,
     pch = 22,
     xlab = "Diámetro (pulgadas)",
     ylab = "Altura (pies)",
     main = "Altura y Ancho de Árboles Cherry Negros")


legend("topright", legend = c("Filtrados", "No Filtrados"), col = c("green", "black"), pch = 22, title = "Diámetro vs Altura")