rankA {ThurMod}

Determine the rank of the design matrix defined by the blocks.

Description

This function determines the rank of the fundamental design matrix defined by the blocks.

Usage

rankA(blocks)

Arguments

blocks

A matrix defining the blocks of the model. The number of rows must be the number of blocks, each row represents a block and contains the item numbers. The number of columns present the number of items per block.

Value

Returns the rank of the design matrix as an integer.

Examples

# Define nine items divided by three triplets as blocks
blocks <- matrix(c(1:9), ncol = 3)

# Determine the rank of the design matrix
rankA(blocks)