如何用ggplot2绘制频率? [英] How to barplot frequencies with ggplot2?

问题描述

我有一个熔化的数据集，其中包含一列值"，该值表示随数据集的每一行而变化的绝对数.我想按国家/地区在条形图中显示此数字.

I have a melted dataset containing a column "value" which represent an absolute number which varies with every row of the dataset. I want to display this number in a barchart by country.

p <- ggplot(melted,aes(factor(country),y=as.numeric(value))) + geom_bar() +opts(axis.text.x = theme_text(angle = 90,hjust = 1)) 

我所得到的是:

pmin(y，0)中的错误:找不到对象"y".

Error in pmin(y, 0) : Objekt 'y' not found.

当然，我三遍检查了是否存在值"变量，但我只是找不到问题所在.如果离开y = ...，我得到的每个国家/地区的观察值与我的情况相同.

Of course I triple-checked if there was a "value" variable I just can't find what's wrong. If a leave the y=... out I get the observations per country which are the same for every country in my case.

推荐答案

您可能需要在 geom_bar()中定义身份统计信息.

You might need to define the identity statistic in geom_bar().

 ggplot(melted,aes(factor(country),y=as.numeric(value))) + 
        geom_bar(stat = "identity", position = "stack")

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