incl/rowAlls.R

In HenrikBengtsson/matrixStats: Functions that Apply to Rows and Columns of Matrices (and to Vectors)

x <- matrix(FALSE, nrow = 10, ncol = 5)
x[3:7, c(2, 4)] <- TRUE
x[2:4, ] <- TRUE
x[, 1] <- TRUE
x[5, ] <- FALSE
x[, 5] <- FALSE
print(x)

print(rowCounts(x))       # 1 4 4 4 0 3 3 1 1 1
print(colCounts(x))       # 9 5 3 5 0

print(rowAnys(x))
print(which(rowAnys(x)))  # 1  2  3  4  6  7  8  9 10
print(colAnys(x))
print(which(colAnys(x)))  # 1 2 3 4