Question

I have a series data in IEnumrable<double>.

Let the dummy data be:

0
0
0
1
1.6
2.5
3.5
2.51
1.0
0
0
0
2.52
3.5
6.5
4.5
1.2
1.0
2.53
3.5

let my value of Exceedence be 1.5, so I want to count the number of time my value in series goes above 1.5 (basically number of times 1.5 constant line cut the graph). In above case it will be 3 ({1.6-2.51}, {2.52-4.5}, {2.53-3.5}).

I can do this by iterating through each member and keeping the count everytime it goes up or down the Exceedence value.

I am wondering is there any way to do this using LINQ query.

Answer 1

Is that what you want?

        bool isAbove = false;
        int count = yourList.Count(x =>
        {
            if (x > 1.5 && !isAbove)
            {
                isAbove = true;
                return true;
            }
            else if (x < 1.5)
            {
                isAbove = false;
            }
            return false;
        });