How to find the starting position of the array from where its value is strictly increasing?

I have a huge temperature data with 2000 values.

It takes a couple of minutes for thermocouple to stabilize and then it increases steadily. I want to find out the position from which it is strictly increasing.

Thanks

Answer 1

[Azzi Abdelmalek]

 y=[1 2 5 0 4 2 7 8 9]

%one line command

 max([1 max((find(diff(y)<=0))+1)])

[Greg Heath]

1+max(find(diff(y) <=0))

[Walter Roberson]

max() of the empty vector is not documented.

[Azzi Abdelmalek]

Walter, it's never empty, it's a concatenation [1 v], if v is empty, the result is not, max([1 v]) will be 1

[Azzi Abdelmalek]

Greg 1+[ ]=[ ]

Answer 2

[Walter Roberson]

pos = find( diff(YourData) <= 0, 1, 'last' ) + 1;
if isempty(pos); pos = 1; end

[Walter Roberson]

pos = find( [0 diff(YourData)] <= 0, 1, 'last'); %single line version