本文整理汇总了C#中Series.LookupIndex方法的典型用法代码示例。如果您正苦于以下问题：C# Series.LookupIndex方法的具体用法？C# Series.LookupIndex怎么用？C# Series.LookupIndex使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Series的用法示例。
在下文中一共展示了Series.LookupIndex方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: SnapToNearest
//public Selection(DateTime t1, DateTime t2)
//{
// this.t1 = t1;
// this.t2 = t2;
// this.ymin = double.MinValue;
// this.ymax = double.MaxValue;
//}
/// <summary>
///
/// </summary>
public void SnapToNearest(Series s)
{
int idx1 = s.LookupIndex(t1, true);
int idx2 = s.LookupIndex(t2, true);
if (idx1 < 0 || idx2 < 0)
{
throw new Exception("Error trying to snap to nearest point");
}
t1 = s[idx1].DateTime;
t2 = s[idx2].DateTime;
}示例2: LookupIndex
public void LookupIndex()
{
Series s = new Series();
s.Add("2006-01-01", 0);
s.Add("2006-01-02", 1);
s.Add("2006-01-03", 2);
s.Add("2006-01-04", 3);
s.Add("2006-01-05", 4);
int i = s.LookupIndex(DateTime.Parse("2006-01-03 12:22 AM"));
Assert.AreEqual(3, i);
i = s.LookupIndex(DateTime.Parse("2006-01-03 12:22 AM"),true);
Assert.AreEqual(2, i);
}示例3: SimpleAverageForDay
private static Point SimpleAverageForDay(Series s, DateTime t, int requiredNumberOfPoints)
{
t = t.Date;
DateTime tomorrow = t.AddDays(1);
int index = s.LookupIndex(t);
if (index < 0) //|| !s.WithinRange(t))
{
// throw new Exception("cannot find the date for an average");
return new Point(t, Point.MissingValueFlag, PointFlag.Missing);
}
Point rval = new Point(t, 0);
int count = 0;
double val = 0;
while (index < s.Count)
{
// integrate through the day.
Point point = s[index];
if (point.DateTime >= tomorrow)
{
break;
}
if (!point.IsMissing && !point.FlaggedBad)
{
val += point.Value;
count++;
}
index++;
}
if (count == 0)
return new Point(t.Date, Point.MissingValueFlag, PointFlag.Missing);
else if( count <requiredNumberOfPoints)
return new Point(t.Date, Point.MissingValueFlag, PointFlag.Missing);
else
return new Point(t.Date, val / count, PointFlag.Computed);
}示例4: Interpolate
/// <summary>
/// Interpolate value at specified time.
/// </summary>
/// <param name="s">Series containing values to interpolate from</param>
/// <param name="t">DateTime to interpolate at</param>
/// <param name="AllowExtrapolate">Allow extrapolation outside Series s</param>
/// <param name="index">index to t or next index in series</param>
/// <returns></returns>
public static double Interpolate(Series s, DateTime t, bool AllowExtrapolate, int index)
{
if (!s.WithinRange(t) && !AllowExtrapolate)
{
string msg = "can not interpolate outside range (" + s.MinDateTime + " --> " + s.MaxDateTime
+ ")\n requested date is " + t;
throw new ArgumentOutOfRangeException(msg);
}
int currentIndex = 0;
if (index >= 0) // use input index to save lookup.
{
currentIndex = index;
}
else
{
currentIndex = s.LookupIndex(t);
}
int i = currentIndex;
if (i < 0)
{ // must allow [i-1]
// this should not happen since we called WithinRange() above
throw new Exception("cannot interpolate with outside array bounds. error#2");
}
Point point = s[i];
// first test for exact match.
if (point.DateTime == t)
{
return point.Value;
}
Point pointM1 = s[i - 1];
if (point.IsMissing || pointM1.IsMissing)
{
throw new Exception("Error: cannot interpolate when point is marked as missing");
}
if (point.DateTime >= t)
{
if (point.DateTime == t)
{
return point.Value;
}
// interpolate.
double y2 = System.Convert.ToDouble(point.Value);
double y1 = System.Convert.ToDouble(pointM1.Value);
DateTime date1 = System.Convert.ToDateTime(pointM1.DateTime);
double rval = Interpolate(t, date1, point.DateTime, y1, y2);
return rval;
}
if (true)
{
Console.WriteLine("Error: cannot interpolate");
throw new Exception("cannot interpolate error #3 did not find proper time. ");
}
// return 0;
}