Question

I have a datatable that I have grouped as follows:

var result = from data in view.AsEnumerable()
                     group data by new {Group = data.Field<string>("group_no")}
                     into grp
                     select new
                     {
                         Group = grp.Key.Group,
                         PRAS = grp.Average(c => Convert.ToDouble(c.Field<string>("pAKT Total")))

                     };

Now, the average function is also counting the empty cells in it’s calculation. For example, there are 10 cells with only 5 populated with values. I want the average to be the sum of the 5 values divided by 5.

How can I ensure that it does what I want?

Thanks.

Answer 1

Maybe something like this:

PRAS = grp.Select(row => row.Field<string>("pAKT Total"))
          .Where(s => !String.IsNullOrEmpty(s))
          .Select(Convert.ToDouble)
          .Average()