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NADA (version 1.6-1.2)
Nondetects and Data Analysis for Environmental Data
Description
Contains methods described by Dennis Helsel in his book "Nondetects And Data Analysis: Statistics for Censored Environmental Data".
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Version
Version
1.6-1.2
1.6-1.1
1.6-1
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1.2-1
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1.0-2
1.0-1
Install
install.packages('NADA')
Monthly Downloads
217
Version
1.6-1.2
License
GPL (>= 2)
Maintainer
Lopaka Lee
Last Published
August 29th, 2025
Functions in NADA (1.6-1.2)
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NADAList-class
Class "NADAList"
Recon
Atrazine in streams of the Midwestern U.S.
HgFish
Mercury concentrations in fish across the United States.
Roach
Lindane in fish from tributaries of the Thames River, UK
Oahu
Arsenic concentrations in Manoa Stream, Oahu Hawaii
TCEReg
TCE ground waters of Long Island -- with explanatory variables
SedPb
Lead in stream sediments before and after wildfires
ShePyrene
Pyrene concentrations in water from Puget Sound, WA USA
TCE
TCE in ground waters of Long Island, New York
Tbl1one
Contaminant concentrations in test and a control group
cenfit
Compute an ECDF for Censored Data
Hatchery
Antibiotic concentrations in fish-hatchery drainage
boxplot-methods
Methods for function boxplot in Package NADA
Silver
Silver-standard concentrations
cenboxplot
Produces a censored boxplot
asSurv-methods
Methods for function asSurv in Package NADA
cenfit-class
Class "cenfit"
cenken-class
Class "cenken"
cendiff
Test Censored ECDF Differences
cendiff-methods
Methods for function cendiff in Package NADA
cenfit-methods
Methods for function cenfit in Package NADA
Thames
Dieldrin, lindane and PCB in fish of the Thames River, UK
cenmle-gaussian-class
Class "cenmle-gaussian"
cenmle-class
Class "cenmle"
cenmle
Regression by Maximum Likelihood Estimation for Left-censored Data
cenken-methods
Methods for function cenken in Package NADA
cenmle-lognormal-class
Class "cenmle-lognormal"
cenreg-gaussian-class
Class "cenreg-gaussian"
cenken
Compute Kendall's tau correlation coefficient and associated line for censored data. Computes the Akritas-Theil-Sen nonparametric line, with the Turnbull estimate of intercept.
cenreg-class
Class "cenreg"
cenreg-lognormal-class
Class "cenreg-lognormal"
cenmle-methods
Methods for function cenmle in Package NADA
cenreg-methods
Methods for function cenreg in Package NADA
coef-methods
Methods for function coef in package NADA
hc.ppoints
Helsel-Cohn style plotting positions
censtats
Produces summary statistics using ROS, MLE, and K-M methods.
cenreg
Compute regression equations and likelihood correlation coefficient for censored data.
flip-methods
Methods for function flip in Package NADA
cenxyplot
Produces a censored x-y scatter plot
censummary
Produces basic summary statistics on censored data
censummary-methods
Methods for function censummary in Package NADA
cor-methods
Methods for function cor in Package NADA
pctCen
Calculate the percentage of values censored
quantile-methods
Methods for function quantile in Package NADA
ros-class
Class "ros"
mean-methods
Methods for function mean in Package NADA
lines-methods
Methods for function lines in Package NADA
residuals-methods
Methods for function residuals in package NADA
ros-methods
Methods for function ros in Package NADA
plot-methods
Methods for function plot in Package NADA
print-methods
Methods for function print in Package NADA
median-methods
Methods for function median in Package NADA
predict-methods
Methods for function predict in package NADA
ros
Regression on Order Statistics
sd-methods
Methods for function sd in Package NADA
summary-methods
Methods for function summary in Package `NADA'
show-methods
Methods for function show in Package NADA
summary.cenreg-class
Class "summary.cenreg"
splitQual
Split character qualifiers and numeric values from qualified data
Arsenic
Dissolved arsenic concentrations in ground water of U.S.
Atra
Atrazine concentrations in Nebraska ground water
Ag
Dissolved silver concentrations from water analyses
Atrazine
Atrazine concentrations in Nebraska ground water -- Another Format
AsExample
Example arsenic concentrations in drinking water
Cen
Create a Censored Object
Bloodlead
Lead concentrations in the blood of herons in Virginia.
AtraAlt
Atrazine concentrations in Nebraska ground water -- Alternative
Cadmium
Cadmium concentrations in fish
ChlfmCA
Chloroform concentrations in California groundwater.
Golden
Blood lead in organs of herons from Virginia
CuZnAlt
Zinc concentrations of the CuZn data set
DOC
DOC in ground water
DFe
Dissolved iron concentrations from the Brazos River, USA
MDCu
Copper in ground water from of San Joaquin Valley, USA
NADA-internal
Internal NADA Objects
As
Dissolved arsenic concentrations in ground water of U.S.
CuZn
Copper and zinc concentrations in ground water