r - 如何向堆叠的条形图添加点

Question

我想在我已经存在的图表上添加点（变量 nb 物种）。我试图用函数添加点，geom_point但不幸的是我有这个错误：

"Discrete value supplied to continuous scale".

你会在下面找到我的数据和我的代码。

  structure(list(SOUNAME = c("BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)", 
"BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)", 
"BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)", 
"BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)", 
"BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)", 
"BALLYSHANNON (CATHLEENS FALL)", "BALLYSHANNON (CATHLEENS FALL)"
), year_month = c("2014-05", "2014-05", "2014-05", "2014-05", 
"2014-06", "2014-06", "2014-06", "2014-06", "2014-07", "2014-07", 
"2014-07", "2014-07"), pre_type = c("NONE", "HEAVY", "LIGHT", 
"MEDIUM", "NONE", "HEAVY", "LIGHT", "MEDIUM", "NONE", "HEAVY", 
"LIGHT", "MEDIUM"), pre_value = c(3, 6, 20, 2, 16, 2, 9, 2, 3, 
3, 22, 3), tem_type = c("V_COLD", "COLD", "HOT", "MEDIUM", "V_COLD", 
"COLD", "HOT", "MEDIUM", "V_COLD", "COLD", "HOT", "MEDIUM"), 
    tem_value = c(0, 31, 0, 0, 0, 24, 6, 0, 0, 23, 8, 0), nb_species = c("NA", 
    "3", "NA", "NA", "NA", "NA", "NA", "NA", "NA", "NA", "NA", 
    "NA"), x = c(1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 
    3L)), .Names = c("SOUNAME", "year_month", "pre_type", "pre_value", 
"tem_type", "tem_value", "nb_species", "x"), row.names = c(NA, 
-12L), class = c("tbl_df", "tbl", "data.frame"))

ggplot(data = complet_b, aes(x = x, y = pre_value, fill = pre_type), stat = "identity") +
          scale_x_continuous(breaks=1:3, labels=unique(complet_b$year_month)) +
          geom_bar(stat = "identity", width=0.3) +
          xlab("date") + ylab ("Number of days of precipitation") +
          ggtitle("Precipitation per month") + labs(fill = "Frequency") +
          geom_bar(data=complet_b,aes(x=x+0.4, y=tem_value, fill=tem_type), width=0.3, stat = "identity") +
          xlab("date") + ylab("Number of days of temperature") +
          ggtitle("Temperature per month") + labs(fill = "Frequency") 

非常感谢您花时间帮助我！

标签： rggplot2geom-barggplotly

Answer 1

您的列nb_species是字符格式，将其转换为数字，您就可以开始了。

快速str(complet_b)会告诉您您的列格式。

complet_b$nb_species <- as.numeric(complet_b$nb_species)

这是您的代码和图中带有点的绘图：

library(ggplot2)
ggplot(data = complet_b, aes(x = x, y = pre_value, fill = pre_type), stat = "identity") +
  scale_x_continuous(breaks=1:3, labels=unique(complet_b$year_month)) +
  geom_bar(stat = "identity", width=0.3) +
  xlab("date") + ylab ("Number of days of precipitation") +
  ggtitle("Precipitation per month") + labs(fill = "Frequency") +
  geom_bar(data=complet_b,aes(x=x+0.4, y=tem_value, fill=tem_type), width=0.3, stat = "identity") +
  xlab("date") + ylab("Number of days of temperature") +
  geom_point(aes(x = x, y= nb_species)) +
  ggtitle("Temperature per month") + labs(fill = "Frequency")