How to sort a matrix by all columns

Question

Suppose I have

arr = 2 1 3
      1 2 3
      1 1 2

How can I sort this into the below?

arr = 1 1 2
      1 2 3
      2 1 3
         


        

Answer 1

I had a similar problem, and solution seems to be simple and elegant:

t(apply(t(yourMatrix),2,sort))