R-如何在数据范围内使零值的条形图绘制为零? [英] R - how to make barplot plot zeros for missing values over the data range?

问题描述

让我们说我有10个观测值，分别是1到10之间的200个整数点:

Lets say I have 10 observations of 200 points of integers between one and ten:

mysample = sample(rep(seq(1,10),20),10);

我想对其进行绘图

barplot(table(mysample));

barplot

在此示例中，没有观察到7.是否可以通过一种快速的方法告诉barplot将x轴范围设置为1到10之间的所有整数，还是必须手动编辑表格?

In this example, there are no observations of 7. Is there a quick way of telling barplot to set the x-axis range to all integers between 1 and 10, or do I have to manually edit the table?

推荐答案

尝试

barplot(table(factor(mysample, levels=1:10)));

通过使用一个因子，R将知道哪些级别缺失"

By using a factor, R will know which levels are "missing"

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