Generate Constraint Matrices

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Description

Generate a constraint matrix with a predefined structure

Usage

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constrMat(n, type=c("monotone","control","average",
                    "laverage","uaverage","caverage"),
          base=1)

Arguments

n

a (possibly named) vector of sample sizes for each group

type

character string defining the type of constraints; one of "monotone", "control","average","laverage","uaverage", or "caverage"

base

column of the constraint matrix representing a control group (when type = "control")

Value

a constraint matrix

Author(s)

Daniel Gerhard and Rebecca M. Kuiper

See Also

orlm, constrSet

Examples

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n <- c(10,20,30,40)
constrMat(n, type="monotone")
constrMat(n, type="control", base=2)
constrMat(n, type="average")
constrMat(n, type="laverage")
constrMat(n, type="uaverage")
constrMat(n, type="caverage", base=2)