Check if vector is increasing monotonely or just increasing

Hello,

I have to check if the elements in a vector are in increasing order (or even equal to each other). In that case the function should return true. But if the following element is smaller, it should return false.

The function below doesn't pass tests if my vector is not monotonous, and I can't understand why?

function t = is_increasing(x)

    k = 1  
    for k = 1:(length(x)-1)
     if x(k+1) - x(k) > 0 || x(k+1) - x(k) == 0
       t = true
       k = k + 1
       
     else 
       t = false
       return
     end
    end
  
end

Answer 1

[KSSV]

Refer here: http://matlabtricks.com/post-29/pattern-search-example-monotonically-increasing-or-decreasing-subset

YOu should read about diff. You can search this question in google. It is asked multiple times.

Edit @Rik: replaced link with archive link, as the original website seems down.