绘制ggplot2中数据的频率[重复]

我有一个数据框架,如下所示:

threshold <- c("thresh1","thresh3","thresh10","thresh3","thresh3", "thresh10")
expression <- c("expressed", "expressed", "expressed", "depleted",  "expressed", "depleted")
data.frame("Threshold" = threshold, "Expression" = expression)

我想生成一个不同阈值计数的柱状图,用表达式括起来。

我试图用 geom_bar() 但我不想把数据堆积起来。相反,我希望不同的类别(耗尽、丰富等)在它们自己的条形图中表示出来。

ggplot(final_nonexpressed, aes(x = threshold, fill = expression))+geom_bar(width = 0.5)

任何帮助都将不胜感激!