NADA: Nondetects and Data Analysis for Environmental Data

Contains methods described by Dennis Helsel in his book "Nondetects And Data Analysis: Statistics for Censored Environmental Data".

Install the latest version of this package by entering the following in R:
AuthorLopaka Lee
Date of publication2017-03-31 06:12:31 UTC
MaintainerLopaka Lee <>
LicenseGPL (>= 2)

View on CRAN

Man pages

Ag: Dissolved silver concentrations from water analyses

Arsenic: Dissolved arsenic concentrations in ground water of U.S.

AsExample: Example arsenic concentrations in drinking water

asSurv-methods: Methods for function asSurv in Package NADA

Atra: Atrazine concentrations in Nebraska ground water

AtraAlt: Atrazine concentrations in Nebraska ground water -...

Atrazine: Atrazine concentrations in Nebraska ground water - Another...

Bloodlead: Lead concentrations in the blood of herons in Virginia.

boxplot-methods: Methods for function boxplot in Package NADA

Cadmium: Cadmium concentrations in fish

Cen: Create a Censored Object

cenboxplot: Produces a censored boxplot

cendiff: Test Censored ECDF Differences

cendiff-methods: Methods for function cendiff in Package NADA

cenfit: Compute an ECDF for Censored Data

cenfit-class: Class "cenfit"

cenfit-methods: Methods for function cenfit in Package NADA

cenken: Compute Kendall's tau correlation coefficient and associated...

cenken-class: Class "cenken"

cenken-methods: Methods for function cenken in Package NADA

cenmle: Regression by Maximum Likelihood Estimation for Left-censored...

cenmle-class: Class "cenmle"

cenmle-gaussian-class: Class "cenmle-gaussian"

cenmle-lognormal-class: Class "cenmle-lognormal"

cenmle-methods: Methods for function cenmle in Package NADA

cenreg: Compute regression equations and likelihood correlation...

cenreg-class: Class "cenreg"

cenreg-gaussian-class: Class "cenreg-gaussian"

cenreg-lognormal-class: Class "cenreg-lognormal"

cenreg-methods: Methods for function cenreg in Package NADA

censtats: Produces summary statistics using ROS, MLE, and K-M methods.

censummary: Produces basic summary statistics on censored data

censummary-methods: Methods for function censummary in Package NADA

cenxyplot: Produces a censored x-y scatter plot

ChlfmCA: Chloroform concentrations in California groundwater.

coef-methods: Methods for function coef in package NADA

cor-methods: Methods for function cor in Package NADA

CuZn: Copper and zinc concentrations in ground water

CuZnAlt: Zinc concentrations of the CuZn data set

DFe: Dissolved iron concentrations from the Brazos River, USA

DOC: DOC in ground water

flip-methods: Methods for function flip in Package NADA

Golden: Blood lead in organs of herons from Virginia

Hatchery: Antibiotic concentrations in fish-hatchery drainage

hc.ppoints: Helsel-Cohn style plotting positions

HgFish: Mercury concentrations in fish across the United States.

lines-methods: Methods for function lines in Package NADA

MDCu: Copper in ground water from of San Joaquin Valley, USA

mean-methods: Methods for function mean in Package NADA

median-methods: Methods for function median in Package NADA

NADA.As: Dissolved arsenic concentrations in ground water of U.S.

NADA-internal: Internal NADA Objects

NADAList-class: Class "NADAList"

Oahu: Arsenic concentrations in Manoa Stream, Oahu Hawaii

pctCen: Calculate the percentage of values censored

plot-methods: Methods for function plot in Package NADA

predict-methods: Methods for function predict in package NADA

print-methods: Methods for function print in Package NADA

quantile-methods: Methods for function quantile in Package NADA

Recon: Atrazine in streams of the Midwestern U.S.

residuals-methods: Methods for function residuals in package NADA

Roach: Lindane in fish from tributaries of the Thames River, UK

ros: Regression on Order Statistics

ros-class: Class "ros"

ros-methods: Methods for function ros in Package NADA

sd-methods: Methods for function sd in Package NADA

SedPb: Lead in stream sediments before and after wildfires

ShePyrene: Pyrene concentrations in water from Puget Sound, WA USA

show-methods: Methods for function show in Package NADA

Silver: Silver-standard concentrations

splitQual: Split character qualifiers and numeric values from qualified...

summary.cenreg-class: Class "summary.cenreg"

summary-methods: Methods for function summary in Package 'NADA'

Tbl1one: Contaminant concentrations in test and a control group

TCE: TCE in ground waters of Long Island, New York

TCEReg: TCE ground waters of Long Island - with explanatory variables

Thames: Dieldrin, lindane and PCB in fish of the Thames River, UK


Ag Man page
Arsenic Man page
As Man page
AsExample Man page
asSurv Man page
asSurv,Cen-method Man page
asSurv,formula-method Man page
asSurv-methods Man page
Atra Man page
AtraAlt Man page
Atrazine Man page
Bloodlead Man page
boxplot-methods Man page
boxplot,ros Man page
boxplot,ros-method Man page
Cadmium Man page
Cen Man page
cenboxplot Man page
cendiff Man page
cendiff,Cen,missing,missing-method Man page
cendiff,formula,missing,missing-method Man page
cendiff-methods Man page
cendiff,numeric,logical,factor-method Man page
cenfit Man page
cenfit,Cen Man page
cenfit,Cen,missing,missing-method Man page
cenfit-class Man page
cenfit,formula Man page
cenfit,formula,missing,missing-method Man page
cenfit-methods Man page
cenfit,numeric,logical Man page
cenfit,numeric,logical,factor Man page
cenfit,numeric,logical,factor-method Man page
cenfit,numeric,logical,missing-method Man page
[,cenfit,numeric,missing,ANY-method Man page
[,cenfit,numeric,missing-method Man page
cenken Man page
cenken-class Man page
cenken,formula,missing,missing,missing-method Man page
cenken-methods Man page
cenken,numeric,logical,numeric,logical-method Man page
cenken,numeric,logical,numeric,missing-method Man page
cenmle Man page
cenmle,Cen,missing,missing-method Man page
cenmle-class Man page
cenmle-gaussian Man page
cenmle-gaussian-class Man page
cenmle-lognormal Man page
cenmle-lognormal-class Man page
cenmle-methods Man page
cenmle,numeric,logical,factor-method Man page
cenmle,numeric,logical,missing-method Man page
cenmle,numeric,logical,numeric-method Man page
cenreg Man page
cenreg-class Man page
cenreg,formula,missing,missing-method Man page
cenreg-gaussian Man page
cenreg-gaussian-class Man page
cenreg-lognormal Man page
cenreg-lognormal-class Man page
cenreg-methods Man page
cenreg,numeric,logical,factor-method Man page
cenreg,numeric,logical,numeric-method Man page
cenros Man page
censtats Man page
censummary Man page
censummary,Cen,missing,missing-method Man page
censummary,formula,missing,missing-method Man page
censummary-methods Man page
censummary,numeric,logical,factor-method Man page
censummary,numeric,logical,missing-method Man page
censummary,numeric,logical,numeric-method Man page
cenxyplot Man page
ChlfmCA Man page
coef,cenreg-method Man page
coefficents-methods Man page
coef-methods Man page
cohn Man page
cor Man page
cor,ANY-method Man page
cor,cenreg-method Man page
cor-methods Man page
CuZn Man page
CuZnAlt Man page
DFe Man page
DOC Man page
flip Man page
flip,Cen-method Man page
flip,formula-method Man page
flip-methods Man page
Golden Man page
Hatchery Man page
hc.ppoints Man page
hc.ppoints.cen Man page
hc.ppoints.uncen Man page
HgFish Man page
lines,ANY-method Man page
lines,cenfit-method Man page
lines,cenken-method Man page
lines-methods Man page
lines,ros-method Man page
lros Man page
MDCu Man page
mean,ANY-method Man page
mean,cenfit-method Man page
mean,cenmle-gaussian-method Man page
mean,cenmle-lognormal-method Man page
mean,cenmle-method Man page
mean-methods Man page
mean,ros-method Man page
median,ANY-method Man page
median,cenfit-method Man page
median,cenmle-gaussian-method Man page
median,cenmle-lognormal-method Man page
median,cenmle-method Man page
median-methods Man page
median,ros-method Man page
NADA.As Man page
NADAList-class Man page
NADAprobs Man page
Oahu Man page
pctCen Man page
pexceed Man page
pexceed,cenfit-method Man page
pexceed,ros-method Man page
plot,ANY,ANY-method Man page
plot,cenfit,ANY-method Man page
plot,cenfit-method Man page
plot,cenmle-gaussian,ANY-method Man page
plot,cenmle-lognormal,ANY-method Man page
plot,cenmle-method Man page
plot,cenreg,ANY-method Man page
plot,cenreg-method Man page
plot-methods Man page
plot,ros-method Man page
plot,ros,missing-method Man page
predict Man page
predict,cenfit-method Man page
predict,cenreg-lognormal-method Man page
predict,cenreg-method Man page
predict-methods Man page
predict,ros-method Man page
print,ANY-method Man page
print,cenfit-method Man page
print,Cen-method Man page
print,cenmle-method Man page
print,cenreg-method Man page
print,censummary-method Man page
print-methods Man page
print,NADAList-method Man page
print,ros-method Man page
print,summary.cenreg-method Man page
quantile,ANY-method Man page
quantile,cenfit-method Man page
quantile,cenmle-gaussian-method Man page
quantile,cenmle-lognormal-method Man page
quantile,cenmle-method Man page
quantile-methods Man page
quantile,ros-method Man page
Recon Man page
residuals,cenreg-method Man page
residuals-methods Man page
Roach Man page
ros Man page
ros-class Man page
ros-methods Man page
ros,numeric,logical-method Man page
sd,ANY-method Man page
sd,cenfit-method Man page
sd,cenmle-gaussian-method Man page
sd,cenmle-lognormal-method Man page
sd,cenmle-method Man page
sd-methods Man page
sd,ros-method Man page
SedPb Man page
ShePyrene Man page
show,ANY,ANY-method Man page
show,cenfit-method Man page
show,cenken-method Man page
show,cenmle-gaussian,ANY-method Man page
show,cenmle-lognormal,ANY-method Man page
show,cenmle-method Man page
show,cenreg-method Man page
show,censummary-method Man page
show-methods Man page
show,NADAList-method Man page
show,ros-method Man page
show,summary.cenreg-method Man page
Silver Man page
splitQual Man page
summary,ANY-method Man page
summary,cenfit-method Man page
summary.cenreg Man page
summary.cenreg-class Man page
summary,cenreg-method Man page
summary-methods Man page
summary,ros-method Man page
Tbl1one Man page
TCE Man page
TCEReg Man page
Thames Man page
trueT Man page


R/All.R R/ken.R R/km.R R/mle.R R/ros.R R/cen.R R/summary.R R/reg.R R/icmle.R
man/summary-methods.Rd man/ros-methods.Rd man/cenboxplot.Rd man/DOC.Rd man/Bloodlead.Rd man/lines-methods.Rd man/mean-methods.Rd man/asSurv-methods.Rd man/ros-class.Rd man/cor-methods.Rd man/plot-methods.Rd man/cenmle.Rd man/NADA-internal.Rd man/Oahu.Rd man/AsExample.Rd man/TCE.Rd man/Recon.Rd man/Ag.Rd man/pctCen.Rd man/Golden.Rd man/Cen.Rd man/summary.cenreg-class.Rd man/Hatchery.Rd man/ros.Rd man/SedPb.Rd man/hc.ppoints.Rd man/Atrazine.Rd man/ShePyrene.Rd man/cenreg-lognormal-class.Rd man/cenmle-gaussian-class.Rd man/Tbl1one.Rd man/cenmle-methods.Rd man/cenreg-methods.Rd man/cenmle-lognormal-class.Rd man/cenmle-class.Rd man/MDCu.Rd man/cenken-class.Rd man/ChlfmCA.Rd man/cenfit.Rd man/flip-methods.Rd man/cenreg-gaussian-class.Rd man/cenreg.Rd man/quantile-methods.Rd man/sd-methods.Rd man/coef-methods.Rd man/boxplot-methods.Rd man/cenfit-methods.Rd man/cendiff-methods.Rd man/CuZnAlt.Rd man/cenken.Rd man/Arsenic.Rd man/TCEReg.Rd man/cendiff.Rd man/censummary-methods.Rd man/CuZn.Rd man/Atra.Rd man/cenken-methods.Rd man/Silver.Rd man/print-methods.Rd man/splitQual.Rd man/cenxyplot.Rd man/censtats.Rd man/Cadmium.Rd man/NADAList-class.Rd man/Roach.Rd man/DFe.Rd man/Thames.Rd man/HgFish.Rd man/AtraAlt.Rd man/cenfit-class.Rd man/censummary.Rd man/predict-methods.Rd man/NADA.As.Rd man/cenreg-class.Rd man/residuals-methods.Rd man/median-methods.Rd man/show-methods.Rd

Questions? Problems? Suggestions? or email at

Please suggest features or report bugs with the GitHub issue tracker.

All documentation is copyright its authors; we didn't write any of that.