查找从 xml 文件中提取的数字的平均值

Question

我有从 XML 文件中提取数据的代码。我想找到每个提取值的平均值（XMax、XMin、YMax、YMin, ZMax, ZMin)

以下是我提取六个值的方法：

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 
            };

我是否在正确的轨道上获得 XMax 的平均值：

 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);

编辑：将字符串转换为双精度或小数或其他：

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

但我实际上会在选择中执行此操作：

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

Answer 2

有帮助吗
http://csharpbasic.blogspot.com/2008 /08/exploring-linq-functions-select-min-max.html

Answer 3

这是一种破解你的答案的方法，但我根本不喜欢这个，而且我确信有一个正确的方法：

double aXMax = 0;
double aXMin = 0;
double aYMax = 0;
double aYMin = 0;
double aZMax = 0;
double aZMin = 0;

int count = (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
        {
            aXMax += x.Element("Max").Value, 
            aXMin += x.Element("Min").Value, 
            aYMax += y.Element("Max").Value, 
            aYMin += y.Element("Min").Value, 
            aZMax += z.Element("Max").Value, 
            aZMin += z.Element("Min").Value 
        }).Count();

aXMax /= (double)count;
aXMin /= (double)count;
aYMax /= (double)count;
aYMin /= (double)count;
aZMax /= (double)count;
aZMin /= (double)count;

还没有测试过它，但它应该可以工作，尽管它是如此丑陋...