如何添加yaxis

如何解决如何添加yaxis

所以我一直在尝试在直方图上添加 Y 轴。现在我的 Y 比例是离散的，但如果我将其更改为连续，则不会绘制。我希望代码有一个 y 轴，列出海龟的数量。

请告诉我我能做什么，谢谢！

这是我的代码：

library(ggplot2)
library(ggridges)
ggplot(Merge,aes(x = SCL,y = Type,group = Type,fill = Type)) +
  geom_density_ridges(stat = "binline",bins = 20,scale = 0.95) +
  scale_y_discrete(name ="Type of Turtles",expand = c(-.0,0.999)) +
  scale_x_continuous(expand = c(0,10),name="Total Length (mm)") +
  coord_cartesian(clip = "off") +
  theme(panel.grid.major = element_line(colour="grey"),legend.position='none',panel.grid.major.x = element_blank(),axis.text.x = 
   element_text(face="bold",size=17,family= "sans",colour = "black"),axis.text.y = element_text(face="bold",text = element_text(face = "bold",colour="black"),panel.grid.minor.x = element_blank(),panel.border = 
     element_rect(fill=NA,colour = "black",size=1.25),panel.background = element_rect(fill='white',colour='black'))

Merge <- read.table(text = '"Turtle_ID","Type","Sex","SCL","Age"
"1","1","Kemps",NA,10,0
"2","2",10.2,0
"3",21,0.75
"4","3",10.8,0
"5",21.4,0.75
"6","4","male",10.5,0
"7",18.2,0.75
"8",22,1.75
"9","5",0
"10","6",11,0
"11",22.9,0.75
"12","7",0
"13",19.4,0.75
"14","8","female",11.5,0
"15",0.75
"16","9",0
"17",20.6,0.75
"18",27.3,1.75
"19","10",11.1,0
"20",24.1,0.75
"21","11",11.3,0
"22",22.6,0.75
"23","12",0
"24",23.5,0.75
"25",29.8,1.75
"26","13",0
"27",21.5,0.75
"28","14",0
"29",22.4,0.75
"30",30.7,1.75
"31","15",0
"32",20.7,0.75
"33",26.8,1.75
"34","16",0
"35",23,0.75
"36","17",12.1,0
"37",25.8,0.75
"38","18",11.4,0
"39",20.3,0.75
"40","19",11.6,0
"41","20",0
"42",21.3,0.75
"43",29.3,1.75
"44","21",11.2,0
"45","22",10.9,0
"46",23.8,0.75
"47","23",12.4,0
"48",25.5,0.75
"49","24",0
"50","25",11.7,0
"51",24.6,0.75
"52",34.9,1.75
"53","26",0
"54",0.75
"55","27",11.8,0
"56",22.5,0.75
"57","28",0
"58",21.1,0.75
"59",1.75
"60",35.1,2.75
"61","29",0
"62",0.75
"63","30",0
"64","31",12,0
"65",21.8,0.75
"66",26.1,1.75
"67","32",0
"68",24.8,0.75
"69","33",0
"70",0.75
"71","34",0
"72",25,0.75
"73",34.5,1.75
"74","35",0
"75",25.9,0.75
"76",36.2,1.75
"77",43.7,2.75
"78","36",0
"79",20,0.75
"80",1.75
"81","37",12.8,0
"82",0.75
"83",27.2,1.75
"84",2.75
"85","38",0
"86",21.7,0.75
"87",30.8,1.75
"88","39",11.9,0
"89",0.75
"90",28,1.75
"91","40",0
"92",22.8,0.75
"93","41",12.7,0
"94",26,0.75
"95","42",12.5,0
"96",24.9,0.75
"97",30.2,1.75
"98",34.7,2.75
"99","43",0
"100",0.75',sep = ",")