Find the maximum and minimum value of every column and then find the maximum and minimum value of every row

Question

I\'ve got this matrix:

a <- matrix(rnorm(1000 * 18, mean = 100, sd = sqrt(10)), 1000, 18)

I would like to find the maximum and minimum v

Answer 1

See the matrixStats package. You can use colMins(), rowMaxs() and functions like this both for columns and rows.

See this answer: How to find the highest value of a column in a data frame in R?