public static double nstdGetGroup(ICanGetProperty data, double avg, int start, int count, int grouplength)
{
int a = (int)(count / grouplength);
if (a < 1)
{
throw new Exception("子组容量过大");
}
if (grouplength < 1)
{
throw new Exception("子组大小必须大于0");
}
double std = 0;
int s = start;
for (int i = 0; i < a; i++)
{
double gavg = 0;
int j = s;
for (int c = 0; c < grouplength; j++)
{
double?temp = data[j];
if (temp != null)
{
gavg += (double)temp / grouplength;
c++;
}
}
std += STDEV.GetEntirety(data, gavg, s, grouplength) / a;
s = j;
}
return(std);
}
public static double rangeGetGroup(ICanGetProperty data, double avg, int start, int count, int grouplength)
{
int a = (int)(count / grouplength);
if (a < 1)
{
throw new Exception("子组容量过大");
}
if (grouplength < 1)
{
throw new Exception("子组大小必须大于0");
}
if (grouplength >= StandardConst.D2.Length || grouplength > count)
{
throw new Exception("子组容量过大");
}
double range = 0;
int s = start;
for (int i = 0; i < a; i++)
{
int j = s;
double max = double.NegativeInfinity;
double min = double.PositiveInfinity;
for (int c = 0; c < grouplength; j++)
{
double?temp = data[j];
if (temp != null)
{
double dtemp = (double)temp;
if (dtemp > max)
{
max = dtemp;
}
if (dtemp < min)
{
min = dtemp;
}
c++;
}
}
range += (max - min) / a;
s = j;
}
range = range / StandardConst.D2[(int)grouplength];
return(range);
}
public static double stdGetGroup(ICanGetProperty data, double avg, int start, int count, int grouplength)
{
int a = (int)(count / grouplength);
if (a < 1)
{
throw new Exception("子组容量过大");
}
if (grouplength < 1)
{
throw new Exception("子组大小必须大于0");
}
if (grouplength >= StandardConst.D2.Length || grouplength > count)
{
throw new Exception("子组容量过大");
}
ArrayVector std = new ArrayVector(a);
int s = start;
double result = 0;
ArrayVector gavg = new ArrayVector(a);
for (int i = 0; i < a; i++)
{
int j = s;
for (int c = 0; c < grouplength; j++)
{
double?temp = data[j];
if (temp != null)
{
gavg.Data[i] += (double)temp / grouplength;
c++;
}
}
gavg.AVG += gavg.Data[i] / a;
std.Data[i] = STDEV.GetEntirety(data, gavg.Data[i], s, grouplength);
std.AVG += std.Data[i] / a;
s = j;
}
std.AVG = std.AVG / StandardConst.C4[(int)grouplength];
//double rbar = (std.data[1] - std.data[0]) / StandardConst.D2[2];
//double rbar = GetAvgMovingRangeXBar(data, start, count);
//bgstd =Math.Max(0, Math.Pow(Math.Pow(rbar,2) - Math.Pow(std.AVG,2)/a,0.5));
//result = Math.Pow(Math.Pow(bgstd, 2) + Math.Pow(std.AVG, 2), 0.5);
result = std.AVG;
return(result);
}
public static double GetAvgMovingRangeXBar(ICanGetProperty data, int start, int count)
{
int s = start;
double?pre;
double rbar = 0;
while ((pre = data[s++]) == null)
{
;
}
for (int i = s, c = 1; c < count; i++)
{
double?temp = data[i];
if (temp != null)
{
rbar += Math.Abs((double)(temp - pre));
c++;
pre = temp;
}
}
rbar = rbar / (count - 1);
return(rbar / StandardConst.D2[2]);
}
public static double GetEntirety(ICanGetProperty data, double avg, int start, int count)
{
double sum = 0;
if (count < 1)
{
throw new Exception("GetEntirety无数据");
}
for (int i = start, c = 0; c < count; i++)
{
double?temp = data[i];
if (temp != null)
{
sum += Math.Pow((double)temp - avg, 2);
c++;
}
}
if (count == 1)
{
count++;
}
return(Math.Pow(sum / (count - 1), 0.5));
}
public static double GetGroup(ICanGetProperty data, double avg, int start, int count, int grouplength, STDEVType type)
{
return(type.Get(data, avg, start, count, grouplength));
}