重新排序因子会产生不同的结果，具体取决于加载的包

I wanted to create a barplot in which the bars were ordered by height rather than alphabetically by category. This worked fine when the only package I loaded was ggplot2. However, when I loaded a few more packages and ran the same code that created, sorted, and plotted my data frame, the bars had reverted to being sorted alphabetically again. I wanted to create a barplot in which the bars