CalculateLC50 {ecotoxicology}

Calculate LC50 from a matrix with 3 columns: concentration, number of exposed subjects and number of deaths

Description

Returns the LC50 from a matrix with 3 columns: concentration, number of exposed subjects and number of deaths

Usage

CalculateLC50(matrixConcExpoResp)

Arguments

matrixConcExpoResp

numeric vector

Value

the LC50

Author(s)

Jose Gama

References

Hamilton, m.a., R.c. Russo, and r.v. Thurston, 1977. Trimmed spearman-karber method for estimating median Lethal concentrations in toxicity bioassays. Environ. Sci. Technol. 11(7): 714-719; Correction 12(4):417 (1978).

Examples

#Data from the example on page 5:
#Hamilton, m.a., R.c. Russo, and r.v. Thurston, 1977.
#Trimmed spearman-karber method for estimating median
#Lethal concentrations in toxicity bioassays.
#Environ. Sci. Technol. 11(7): 714-719;
#Correction 12(4):417 (1978).
concentration<-c(.5,1,2,4,8)
exposed<-c(10,10,10,10,10)
mortality<-c(0,2,4,9,10)
CalculateLC50(cbind(concentration, exposed, mortality))