Function calculates the trait coverage of the community for each level of the sampling hierarchy and makes a barplot.
Shows at which level the data are coming from in each plot.
# S3 method for filled_trait
autoplot(object, other_col_how, ...)output from trait_fill().
what to do with the other columns in other data.
Options are to filter by one of the columns, add them to the x-axis,
facet by them, or to ignore.
optional filters for use with other_col_how = "filter"
a ggplot2 plot