plotNorm: Plot manifest and fitted norm scores

In cNORM: Continuous Norming

Plot manifest and fitted norm scores

Description

This function plots the manifest norm score against the fitted norm score from the inverse regression model per group. This helps to inspect the precision of the modeling process. The scores should not deviate too far from the regression line. Applicable for Taylor polynomial models.

Usage

plotNorm(
  model,
  age = NULL,
  score = NULL,
  width = NULL,
  weights = NULL,
  group = FALSE,
  minNorm = NULL,
  maxNorm = NULL,
  type = 0
)

Arguments

model	The regression model, usually from the 'cnorm' or 'cnorm.betabinomial' function
age	In case of beta binomial model, please provide the age vector
score	In case of beta binomial model, please provide the score vector
width	In case of beta binomial model, please provide the width for the sliding window. If null, the function tries to determine a sensible setting.
weights	Vector or variable name in the dataset with weights for each individual case. If NULL, no weights are used.
group	On optional grouping variable, use empty string for no group, the variable name for Taylor polynomial models or a vector with the groups for beta binomial models
minNorm	lower bound of fitted norm scores
maxNorm	upper bound of fitted norm scores
type	Type of display: 0 = plot manifest against fitted values, 1 = plot manifest against difference values

Value

A ggplot object representing the norm scores plot.

See Also

Other plot: compare(), plot.cnorm(), plot.cnormBetaBinomial(), plot.cnormBetaBinomial2(), plotDensity(), plotDerivative(), plotNormCurves(), plotPercentileSeries(), plotPercentiles(), plotRaw(), plotSubset()

Examples

## Not run: 
# Load example data set, compute model and plot results

# Taylor polynomial model
model <- cnorm(raw = elfe$raw, group = elfe$group)
plot(model, "norm")

# Beta binomial models; maximum number of items in elfe is n = 28
model.bb <- cnorm.betabinomial(elfe$group, elfe$raw, n = 28)
plotNorm(model.bb, age = elfe$group, score = elfe$raw)

## End(Not run)

cNORM documentation built on Nov. 4, 2024, 5:07 p.m.