adoptr (version 1.1.1)

composite: Score Composition

Description

composite defines new composite scores by point-wise evaluation of scores in any valid numerical expression.

Usage

composite(expr, label = NA_character_)
# S4 method for CompositeScore,TwoStageDesign
evaluate(s, design, ...)

Value

an object of class CompositeConditionalScore or CompositeUnconditionalScore depending on the class of the scores used in expr

Arguments

expr

Expression (in curly brackets); must contain at least one score variable; if multiple scores are used, they must either all be conditional or unconditional. Currently, no non-score variables are supported

label

object label (string)

s

object of class CompositeScore

design

object

...

further optional arguments

See Also

Scores

Examples

ess   <- ExpectedSampleSize(Normal(), PointMassPrior(.4, 1))
power <- Power(Normal(), PointMassPrior(.4, 1))

# linear combination:
composite({ess - 50*power})

# control flow (e.g. for and while loops)
composite({
  res <- 0
  for (i in 1:3) {
     res <- res + ess
  }
  res
})

# functional composition
composite({log(ess)})
cp <- ConditionalPower(Normal(), PointMassPrior(.4, 1))
composite({3*cp})