nnzeroGroups

Utility function to compute number of zeros-per-feature within group

nnzeroGroups(X, y, MARGIN = 2)

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

# S3 method for matrix
nnzeroGroups(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)
nnz_res <- nnzeroGroups(exprs, y, 1)
nnz_res <- nnzeroGroups(t(exprs), y, 2)