# Using apply()

# Define a matrix m

m<-matrix(c(1,2,3,4,5,6,7,8,9,10,11,12), nrow=3, byrow=T)

# Display m

m

# Apply the mean() function to each row

apply(m, 1, mean)

# Apply the mena() function to each column

apply(m, 2, mean)

# Create a function to divide by 2

halve<-function(x) x/2

# Apply halve() to each row

apply(m, 1, halve)  # Returns 4x3, not 3x4 matrix

# Apply halve() to each row and transpose

t(apply(m,1,halve))