Draft: Correct the source of the occasional error in rendering the Discriminant Plot
When drawing the discriminant plot, a category which only has a single data point cannot be used to calculate the densities. We have one of those with "story":
categories
analyze characterize comment describe dialogue diary e-mail_informal letter_formal magazine
109 2 83 19 4 7 45 14 6
monologue paraphrase_sonnet speech story summarize
4 3 6 1 95
I updated the utility.R file to ignore density calculations if there is only a single data point.