Question

I have a set of data that has two points; “watts” and a time stamp.

Each data point is separated by 1 second.

So it looks like this:

0:01 100
0:02 110
0:03 133
0:04 280

…..

The data set is a couple hours long.

I’d like to write a query where I can find the maximum average watts for different time periods (5 seconds, 1 minutes, 5 minutes, 20 minutes, ect).

I’d also like to know where in the data set that maximum average took place.

Edit
I think I need to do a query with a moving average and the appropriate bucket (let’s say 10 seconds). Once I get that result, I query that to find the max.

Answer 1

Okay, a guy at work helped me. Here’s the answer in LINQ Pad.

var period = 10;
var rnd = new Random();
// Create some data.
var series = Enumerable.Range(0, 3600)
    .Select(i => Tuple.Create(new TimeSpan(0, 0, i), rnd.Next(300))).ToList();

var item = Enumerable.Range(0, 3600).AsParallel() 
                .Select(i => series.Skip(i).Take(10)) 
                .Select((e, i) => new { Average = e.Sum(x => x.Item2) / e.Count(), Second = i }) 
                .OrderByDescending(a => a.Second).Dump();

                item.First().Dump();