如何用ggplot绘制矢量的直方图/频率计数？ [英] How to plot histogram/ frequency-count of a vector with ggplot?

问题描述

我想用 ggplot 来从数值向量中绘制值的频率。使用 plot（）非常简单，但我无法通过 ggplot 获得相同结果。

I want to plot with ggplot the frequency of values from a numeric vector. With plot() is quite straight forward but I can't get the same result with ggplot.

library(ggplot2)    
dice_results <- c(1,3,2,4,5,6,5,3,2,1,6,2,6,5,6,4)    
hist(dice_results)

ggplot(dice_results) + geom_bar()
# Error: ggplot2 doesn't know how to deal with data of class numeric

我应该为 ggplot（）创建一个数据框来绘制我的向量吗？

Should I create a dataframe for ggplot() to plot my vector?

推荐答案

请查看帮助页面？geom_histogram 。从第一个例子中，你可能会发现这是有效的。

Please look at the help page ?geom_histogram. From the first example you may find that this works.

qplot(as.factor(dice_results), geom="histogram")

请看？ggplot 。你会发现数据必须是 data.frame

Also look at ?ggplot. You will find that the data has to be a data.frame

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