Preserve factor level order when creating sample_data #406
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The better fix for this would be to use the canonical https://stat.ethz.ch/R-manual/R-devel/library/base/html/droplevels.html |
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I just started using phyloseq and it is great! However, I was slightly annoyed that sample_data() changed the ordering of the factor levels. These play important role in drawing plots with ggplot2, so I decided to create a quick fix for the problem. There I drop unused levels but the order of remaining ones stays the same.