createRandomSequences: Create random sequences of blockwise equally distributed...
In hsonne/blockrand2: Block Randomisation for Clinical Studies

Description Usage Arguments Value Examples

Create random sequences of blockwise equally distributed values. The blocksizes are chosen according to the number of values to be created.

1	createRandomSequences(x, counts, names.strata = NULL)

`x`	vector of values to be chosen from
`counts`	vector of integers defining the lengths of vectors of values to be created
`names.strata`	vector of character to be used as element names in the output list

list of vectors of values out of x with lengths according to the values given in counts

# Define stratum levels
strata <- list(
 sex = c("male", "female"),
 medication = c("yes", "no"),
 lesion = c("low", "high")
)

# Create some testdata using the stratum levels and group and count by stratum
byStratum <- stratify(createTestdata(strata, 50))

# Create random sequences of treatments (A, B)
sequences <- createRandomSequences(
 x = c("A", "B"),
 counts = byStratum$n,
 names.strata = byStratum$stratum
)

# Append a column "treatments" showing the sequences of treatments as comma
# separated lists
byStratum$treatments <- sapply(sequences, paste, collapse = ",")

# Show the result
byStratum