Chapter 3 motivating plot

[jamessv]

`> spam.path <- file.path("C:\03-Classification\data", "spam")

spam2.path <- file.path("C:\03-Classification\data", "spam_2")
easyham.path <- file.path("C:\03-Classification\data", "easy_ham")
easyham2.path <- file.path("C:\03-Classification\data", "easy_ham_2")
hardham.path <- file.path("C:\03-Classification\data", "hard_ham")
hardham2.path <- file.path("C:\03-Classification\data", "hard_ham_2")
x <- runif(1000, 0, 40)
y1 <- cbind(runif(100, 0, 10), 1)
y2 <- cbind(runif(800, 10, 30), 2)
y3 <- cbind(runif(100, 30, 40), 1)
val <- data.frame(cbind(x, rbind(y1, y2, y3)),

•               stringsAsFactors = TRUE)
  

ex1 <- ggplot(val, aes(x, V2)) +

• geom_jitter(aes(shape = as.factor(V3)),

•               position = position_jitter(height = 2)) +
  

• scale_shape_discrete(guide = "none", solid = FALSE) +
• geom_hline(aes(yintercept = c(10,30)), linetype = 2) +
• theme_bw() +
• xlab("X") +
• ylab("Y")

ggsave(plot = ex1,

•    filename = file.path("C:\\03-Classification\\images", "00_Ex1.pdf"),
  

•    height = 10,
  

•    width = 10)
  

Error in grDevices::pdf(..., version = version) :
cannot open file 'C:\03-Classification\images/00_Ex1.pdf'

ggsave(plot = ex1,

•    filename = file.path("C:\\03-Classification\\images\\00_Ex1.pdf"),
  

•    height = 10,
  

•    width = 10)
  

Error: Aesthetics must be either length 1 or the same as the data (1000): yintercept

getwd()
[1] "C:/Users/mm/Documents"

`

[hao2leaf]

You can split "geom_hline(aes(yintercept = c(10,30)), linetype = 2) +" into "geom_hline(aes(yintercept = c(10)), linetype = 2) + geom_hline(aes(yintercept = c(30)), linetype = 2) +". This will help.