CDC                     BMI growth curves from age 2 to 25
bestModel               Retrieve the best fitting regression model
                        based on powers of A, L and interactions
buildFunction           Build regression function for bestModel
cNORM.GUI               Launcher for the graphical user interface of
                        cNORM
calcPolyInL             Internal function for retrieving regression
                        function coefficients at specific age
calcPolyInLBase         Internal function for retrieving regression
                        function coefficients at specific age
checkConsistency        Check the consistency of the norm data model
checkWeights            Check, if NA or values <= 0 occur and issue
                        warning
cnorm                   Continuous Norming
cnorm.cv                Cross validation for term selection
computePowers           Compute powers of the explanatory variable a as
                        well as of the person location l (data
                        preparation)
computeWeights          Weighting of cases through iterative
                        proportional fitting (Raking)
derivationTable         Create a table based on first order derivative
                        of the regression model for specific age
derive                  Derivative of regression model
elfe                    Sentence completion test from ELFE 1-6
epm                     Simulated dataset (Educational and
                        Psychological Measurement, EPM)
getGroups               Determine groups and group means
getNormCurve            Computes the curve for a specific T value
getNormScoreSE          Calculates the standard error (SE) or root mean
                        square error (RMSE) of the norm scores In case
                        of large datasets, both results should be
                        almost identical
life                    Life expectancy at birth from 1960 to 2017
modelSummary            Prints the results and regression function of a
                        cnorm model
mortality               Mortality of infants per 1000 life birth from
                        1960 to 2017
normTable               Create a norm table based on model for specific
                        age
plot.cnorm              S3 function for plotting cnorm objects
plotCnorm               General convencience plotting function
plotDensity             Plot the density function per group by raw
                        score
plotDerivative          Plot first order derivative of regression model
plotNorm                Plot manifest and fitted norm scores
plotNormCurves          Plot norm curves
plotPercentileSeries    Generates a series of plots with number curves
                        by percentile for different models
plotPercentiles         Plot norm curves against actual percentiles
plotRaw                 Plot manifest and fitted raw scores
plotSubset              Evaluate information criteria for regression
                        model
ppvt                    Vocabulary development from 2.5 to 17
predictNorm             Retrieve norm value for raw score at a specific
                        age
predictRaw              Predict single raw value
prepareData             Prepare data for modeling in one step
                        (convenience method)
prettyPrint             Format raw and norm tables The function takes a
                        raw or norm table, condenses intervals at the
                        bottom and top and round the numbers to
                        meaningful interval.
print.cnorm             S3 method for printing model selection
                        information
printSubset             Convenience method for printing model selection
                        information
rangeCheck              Check for horizontal and vertical extrapolation
rankByGroup             Determine the norm scores of the participants
                        in each subsample
rankBySlidingWindow     Determine the norm scores of the participants
                        by sliding window (experimental)
rawTable                Create a table with norm scores assigned to raw
                        scores for a specific age based on the
                        regression model
regressionFunction      Regression function
simMean                 Simulate mean per age
simSD                   Simulate sd per age
simulateRasch           Simulate raw test scores based on Rasch model
standardizeRakingWeights
                        Function for standardizing raking weights
                        Raking weights get divided by the smallest
                        weight. Thereby, all weights become larger or
                        equal to 1 without changing the ratio of the
                        weights to each other.
summary.cnorm           S3 method for printing the results and
                        regression function of a cnorm model
weighted.quantile       Weighted quantile estimator
weighted.quantile.harrell.davis
                        Weighted Harrell-Davis quantile estimator
weighted.quantile.inflation
                        Weighted quantile estimator through case
                        inflation
weighted.quantile.type7
                        Weighted type7 quantile estimator
weighted.rank           Weighted rank estimation
