Check if vector is increasing monotonely or just increasing

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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

Accepted Answer

KSSV
KSSV on 22 Mar 2019
Edited: Rik on 2 Feb 2023
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.

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