has_signif_negative_cluster: Does a well have a statistically significant number of... In ddpcr: Analysis and Visualization of Droplet Digital PCR in R and on the Web

Description

Classify a well as having a significant negative cluster (eg. a mutant well) or not using a binomial test.

We can call a well as mutant if it is statistically significantly more than 1 mutant drops, then the mutant frequency is 1.4 significantly more than 1 P(x >= 7) = 1 - P(x <= 7) + P(x = 7) = 1 - pbinom(7, 500, .01) + dbinom(7, 500, .01) = 0.237 > 0.01 So not statistically significantly enough, so we say it's a wildtype well. But if there are 5000 drops and 70 mutant drops (same 1.4 with higher absolute numbers), then P(x >= 70) = 1 - pbinom(70, 5000, .01) + dbinom(70, 5000, .01) = 0.004 So this is indeed significant, and this well would be deemed mutant.

Usage

 1 has_signif_negative_cluster(plate, neg, pos)

Arguments

 plate A ddPCR plate neg Number of negative (or mutant) drops pos Number of positive (or wildtype) drops

Value

TRUE if the number of negative drops is statistically significant, FALSE otherwise.

ddpcr documentation built on July 8, 2020, 6:49 p.m.