check_id_visit: Check ID and visit specification for I2C2
In neuroconductor-devel/I2C2: Image Intraclass Correlation Coefficient

Description Usage Arguments Value Examples

View source: R/check_id_visit.R

Checks the input for I2C2

1	check_id_visit(y, id, visit)

y

An n by p data matrix containing n vectorized image data with p voxels. Each row contains one observed image data at a particular visit for one subject. Each column contains image values for all subjects and visits at a particular voxel.

The rows are organized by subjects and then visits, EX) (Y11, Y12, Y21, Y22, ... , YI1 , YI2)

id

Vector of IDs, EX) c(1, 1, 2, 2, 3, 3, 4, 4, ... , I, I)

visit

Vector of visits, EX) (1, 2, 1, 2, 1, 2, ... , 1, 2)

List of elements: reordered data, id, visit, I (number of ids), number of rows (n), and number of columns (p)

id = c(1:10, 10:1)
visit = rep(1:2, each = 10)
visit = as.character(visit)
n = length(id)
p = 100
y = matrix(rnorm(n * p), nrow = n, ncol = p)
check_id_visit(y =y, id = id, visit = visit)