C#计算CPK值（转）

C#计算CPK值
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ODSensor.util
{
class CpkPro
{
private float StDev(float[] arrData) //计算标准偏差
{
float xSum = 0F;
float xAvg = 0F;
float sSum = 0F;
float tmpStDev = 0F;
int arrNum = arrData.Length;
for (int i = 0; i < arrNum; i++)
{
xSum += arrData[i];
}
xAvg = xSum / arrNum;
for (int j = 0; j < arrNum; j++)
{
sSum += ((arrData[j] - xAvg) * (arrData[j] - xAvg));
}
tmpStDev = Convert.ToSingle(Math.Sqrt((sSum / (arrNum - 1))).ToString());
return tmpStDev;
}
private float Cp(float UpperLimit, float LowerLimit, float StDev)//计算cp
{
float tmpV = 0F;
tmpV = UpperLimit - LowerLimit;
return Math.Abs(tmpV / (6 * StDev));
}
private float Avage(float[] arrData) //计算平均值
{
float tmpSum = 0F;
for (int i = 0; i < arrData.Length; i++)
{
tmpSum += arrData[i];
}
return tmpSum / arrData.Length;
}
private float Max(float[] arrData) //计算最大值
{
float tmpMax = 0;
for (int i = 0; i < arrData.Length; i++)
{
if (tmpMax < arrData[i])
{
tmpMax = arrData[i];
}
}
return tmpMax;
}
private float Min(float[] arrData) //计算最小值
{
float tmpMin = arrData[0];
for (int i = 1; i < arrData.Length; i++)
{
if (tmpMin > arrData[i])
{
tmpMin = arrData[i];
}
}
return tmpMin;
}
private float CpkU(float UpperLimit, float Avage, float StDev)//计算CpkU
{
float tmpV = 0F;
tmpV = UpperLimit - Avage;
return tmpV / (3 * StDev);
}
private float CpkL(float LowerLimit, float Avage, float StDev) //计算CpkL
{
float tmpV = 0F;
tmpV = Avage - LowerLimit;
return tmpV / (3 * StDev);
}
private float Cpk(float CpkU, float CpkL) //计算Cpk
{
return Math.Abs(Math.Min(CpkU, CpkL));
}
public float getR_value(float[] k_valuesTOO)
{
float min = k_valuesTOO[0];
float max = k_valuesTOO[0];
for (int i = 0; i < k_valuesTOO.Length; i++)
{
if (k_valuesTOO[i] < min)
{
min = k_valuesTOO[i];
}
if (k_valuesTOO[i] > max)
{
max = k_valuesTOO[i];
}
}
return max - min;
}
public float getCPK(float[] k, float UpperLimit, float LowerLimit) //获取CPK值
{
//CpkPro cpkPro = new CpkPro();
//float[] k = { 0.03F, 0.06F, 0.05F, 0.03F, 0.04F, 0.04F, 0.03F, 0.04F, 0.04F, 0.04F, 0.04F, 0.04F, 0.04F, 0.03F, 0.01F, 0.03F, 0.01F, 0.03F, 0.04F, 0.04F, 0.04F, 0.05F, 0.02F, 0.04F, 0.05F, 0.05F, 0.05F, 0.05F, 0.03F, 0.05F, 0.05F, 0.03F, 0.02F, 0.04F, 0.04F, 0.02F, 0.06F, 0.04F, 0.02F, 0.03F, 0.04F, 0.02F, 0.05F, 0.06F, 0.07F, 0.02F, 0.04F, 0.04F, 0.03F, 0.03F };
//float UpperLimit = 0.12F; //上限
//float LowerLimit = 0F; //下限
//float result = cpkPro.getCPK(k, UpperLimit, LowerLimit);
//Console.WriteLine(result);
if (k.Length <= 1 || UpperLimit <= LowerLimit)
{
return -1;
}
float cpk = Cpk(CpkU(UpperLimit, Avage(k), StDev(k)), CpkL(LowerLimit, Avage(k), StDev(k)));
return cpk;
}
}
}

原文链接：https://blog.csdn.net/qq_32352825/article/details/86537417