Hiya, running decontam on output from a qiime pipeline. Data is 16s skin microbiome. Got some interesting plots showing non-contaminants and contaminants and wondering if this looks right to people who have done this before? I feel like my noncontaminants are very sparse and my contaminants don't follow the red trendline as closely as they could. Also, does anyone know what the massive collection of black data points/dots at the bottom of all the graphs represent? for reference I generated my contaminant list with a higher threshold:
contamdf.freq <- isContaminant(ps, method="frequency", conc="quant_reading", threshold = 0.2)
Top "non-contaminants":
"Contaminants":
Thanks!