sumGroups

Utility function to sum over group labels

sumGroups(X, y, MARGIN = 2)

# S3 method for dgCMatrix
sumGroups(X, y, MARGIN = 2)

# S3 method for matrix
sumGroups(X, y, MARGIN = 2)

Arguments

X

matrix

y

group labels

MARGIN

whether observations are rows (=2) or columns (=1)

Value

Matrix of groups by features

Examples

data(exprs)
data(y)
sumGroups_res <- sumGroups(exprs, y, 1)
sumGroups_res <- sumGroups(t(exprs), y, 2)