r - ggplot2 错误：找不到对象“比率”

Question

我在网上找到了一个代码，它必须（将）生成一个代表美国劳工部的一些数据的图形：劳工统计局：

library(ggplot2)
df <- as.data.frame(read.csv("unemp.csv", colClasses = c("Date", "numeric")))
p <- ggplot(df,aes(x=date,y=ratio))
p + geom_point() + geom_smooth() + xlab("Year") + 
ylab("Civilian Employment Population Ratio (%)") + 
labs(title="Bureau of Labor Statistics Series EMRATIO 
            (seasonally adjusted) to 2012-10-01")

但它不起作用并产生此错误：

Don't know how to automatically pick scale for object of type function. Defaulting to continuous
Error in eval(expr, envir, enclos) : object 'ratio' not found

这段代码缺少什么？

'unemp.csv' 包含来自此处的数据，生成的图形必须如下所示。

Answer 1

出现错误是因为没有任何名为“日期”和“比率”的变量。这工作正常：

 library(ggplot2)
df <- as.data.frame(read.table("unemp.txt", header = TRUE, colClasses = c("Date", "numeric")))
names(df) <- c("date", "ratio")
p <- ggplot(df,aes(x=date,y=ratio))
p + geom_point() + geom_smooth() + xlab("Year") + 
  ylab("Civilian Employment Population Ratio (%)") +
  labs(title="Bureau of Labor Statistics Series EMRATIO (seasonally adjusted) to 2012-10-01")

Answer 2

像这样的https://stackoverflow.com/questions/16201906/how-can-i-get-the-value-of-a-kernel-density-estimate-at-specific-points可能对其他人有用周围的热图。