R 使用ggplot2为甘特图创建图例

好吧，我试着做一些简单的事情，但似乎做不到。我想为图表上的点做一个图例，然而，无论我做什么，我似乎都无法使它工作。如果你能帮我为ggplot中创建的点和线制作一个图例，我将非常感激！形状15点应为“进入市场”，形状19点应为“退出市场”

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table1我自己想出来的给你

table1 <- as.data.frame(matrix(c(
"Drug1",      "Filing", "2020-04-12",
"Drug2",      "Filing", "2020-05-12",
"Drug3",      "Filing", "2020-04-23",
"Drug4",      "Filing", "2020-01-27",
"Drug5",      "Filing", "2020-02-02",
"Drug1",      "Approval", "2021-04-12",
"Drug2",      "Approval", "2021-06-12",
"Drug3",      "Approval", "2021-07-23",
"Drug4",      "Approval", "2021-04-27",
"Drug5",      "Approval", "2021-03-02"),byrow = TRUE,ncol=3,nrow=10))
colnames(table1) <- c("Name", "variable", "value")
table1$value <-as.Date(table1$value)

shapes  <- c("s1" = 15, "s2" = 19)

ggplot(table1 , aes(as.Date(value, "%m/%d/%Y"), Name))+ 
  geom_point(data= table1 [table1 $variable=="Filing",], aes(as.Date(value, "%m/%d/%Y"), Name,   shape = "s1"),size=3)+
  geom_point(data= table1 [table1 $variable=="Approval",], aes(as.Date(value, "%m/%d/%Y"), Name,   shape = "s2"),size=3)+
  geom_line(data=(table1 [table1 $variable=="Filing" |  table1 $variable=="Approval",]), aes(as.Date(value, "%m/%d/%Y"), Name), linetype="solid", size=1)+
  scale_shape_manual(breaks = c("s1", "s2"),values=c("s1" = 15, "s2" = 19),labels = c("Filing Date", "Approval Date"))

表1
table1 <- as.data.frame(matrix(c(
"Drug1",      "Filing", "2020-04-12",
"Drug2",      "Filing", "2020-05-12",
"Drug3",      "Filing", "2020-04-23",
"Drug4",      "Filing", "2020-01-27",
"Drug5",      "Filing", "2020-02-02",
"Drug1",      "Approval", "2021-04-12",
"Drug2",      "Approval", "2021-06-12",
"Drug3",      "Approval", "2021-07-23",
"Drug4",      "Approval", "2021-04-27",
"Drug5",      "Approval", "2021-03-02"),byrow = TRUE,ncol=3,nrow=10))
colnames(table1) <- c("Name", "variable", "value")
table1$value <-as.Date(table1$value)

shapes  <- c("s1" = 15, "s2" = 19)

ggplot(table1 , aes(as.Date(value, "%m/%d/%Y"), Name))+ 
  geom_point(data= table1 [table1 $variable=="Filing",], aes(as.Date(value, "%m/%d/%Y"), Name,   shape = "s1"),size=3)+
  geom_point(data= table1 [table1 $variable=="Approval",], aes(as.Date(value, "%m/%d/%Y"), Name,   shape = "s2"),size=3)+
  geom_line(data=(table1 [table1 $variable=="Filing" |  table1 $variable=="Approval",]), aes(as.Date(value, "%m/%d/%Y"), Name), linetype="solid", size=1)+
  scale_shape_manual(breaks = c("s1", "s2"),values=c("s1" = 15, "s2" = 19),labels = c("Filing Date", "Approval Date"))