plotn: Plots the relation between the probability of detection and...

In msamp: Estimate Sample Size to Detect Bacterial Contamination in a Product Lot

Plots the relation between the probability of detection and the sample size, n

Description

The plotn() function examines the effect of increasing the probability of detection on the sample size, n, where the probability of a single sample unit being contaminated above the target limit is calculated from the msamp function p()

Usage

plotn(
  C,
  w,
  G,
  Sens,
  D = c("homogeneous", "heterogeneous", "localized"),
  r = NULL,
  f = NULL
)

Arguments

C	suspected lot contamination (CFU/g)
w	weight of single sample unit (g)
G	target value to detect (CFU/g)
Sens	sensitivity of the analytical test (%)
D	distribution of the bacteria in the product lot: "homogeneous", "heterogeneous", or "localized"
r	for the heterogeneous case only, the degree of heterogeneity. r > 0
f	for the localized case, r is further specified. 0 < f < 1

Details

Refer to vignette for details.

Value

A plot, of recordedplot class. The probability of detection is on the y-axis and the sample size n is on the x-axis. Overlaid at intersecting red dashed lines is the sample size for probability of detection (prob_det) = 0.9.

msamp documentation built on Oct. 17, 2022, 5:10 p.m.