metablock {ThurMod}

Find all general blocks

Description

This function creates meta interlinked blocks within a Thurstonian design.

Usage

metablock(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.

Details

This function creates meta interlinked blocks of a block design. These are blocks, that have at least one link from each of its items to any other of its items. If there is not such a link between every item, there are at least two meta blocks.

Value

Returns a list of items that form meta interlinked blocks.

Examples

# Define 30 items divided by ten triplets as blocks
blocks <- matrix(c(1:30), ncol = 3)

# Add one block to link the first three blocks.
blocks <- rbind(blocks,c(1,2,3))

# Find mata blocks
metablock(blocks)