Question

I have code that extracts data out of an XML file. I want to find the average / mean value for each of the extracted values (XMax, XMin, YMax, YMin, ZMax, ZMin)

Here is how I extracted the six values:

var query = from file in fileEntries
            let doc = XDocument.Load(file) 
            let x = doc.Descendants("XAxisCalib").Single() 
            let y = doc.Descendants("YAxisCalib").Single() 
            let z = doc.Descendants("ZAxisCalib").Single() 
            select new
            {
                XMax = x.Element("Max").Value, 
                XMin = x.Element("Min").Value, 
                YMax = y.Element("Max").Value, 
                YMin = y.Element("Min").Value, 
                ZMax = z.Element("Max").Value, 
                ZMin = z.Element("Min").Value 
            };

Am I on the right track with this average for XMax:

 var Average1 =
    from a in query
    select new 
    { AvgMaxX =  a.Average(a => a.XMax) };

Answer 1

var averageMaximumX = query.Average(t => t.XMax);
var averageMinimumX = query.Average(t => t.XMin);
var averageMaximumY = query.Average(t => t.YMax);
var averageMinimumY = query.Average(t => t.YMin);
var averageMaximumZ = query.Average(t => t.ZMax);
var averageMinimumZ = query.Average(t => t.ZMin);

EDIT: To convert the strings to doubles or decimals or whatever:

var averageMaximumX = query.Average(t => double.Parse(t.XMax));
//OR: var averageMaximumX = query.Average(t => decimal.Parse(t.XMax));

But I would actually do it in the select:

select new
{
    XMax = double.Parse(x.Element("Max").Value),
    XMin = double.Parse(x.Element("Min").Value),
// etc.