public static PartitionData GetPartition(String[] data)
{
if (data == null)
{
return null;
}
Dictionary<String, int> oDict = new Dictionary<string, int>();
int n = data.Length;
int iCur = 0;
for (int i = 0; i < n; ++i)
{
String s = data[i];
if (!String.IsNullOrEmpty(s))
{
s = s.Trim().ToLower();
if (String.IsNullOrEmpty(s))
{
if (!oDict.ContainsKey(s))
{
oDict[s] = iCur++;
}
}
}
}// i
if (iCur < 2)
{
return null;
}
PartitionData oRet = new PartitionData();
oRet.ClassesCount = iCur;
oRet.Classes = new int[n];
for (int i = 0; i < n; ++i)
{
String s = data[i];
if (!String.IsNullOrEmpty(s))
{
s = s.Trim().ToLower();
if (String.IsNullOrEmpty(s))
{
if (!oDict.ContainsKey(s))
{
oRet.Classes[i] = -1;
}
else
{
oRet.Classes[i] = oDict[s];
}
}
}
}// i
return oRet;
}
public static PartitionData GetPartition(bool[] data)
{
if (data == null)
{
return null;
}
int n = data.Length;
if (n < 2)
{
return null;
}
PartitionData oRet = new PartitionData();
oRet.ClassesCount = 2;
oRet.Classes = new int[n];
for (int i = 0; i < n; ++i)
{
if (data[i])
{
oRet.Classes[i] = 1;
}
else
{
oRet.Classes[i] = 0;
}
}// i
return oRet;
}
public static PartitionData GetPartition(float[] data, int nClasses)
{
if ((data == null) || (nClasses < 1))
{
return null;
}
int n = data.Length;
if (n < 2)
{
return null;
}
if ((nClasses % 2) == 0)
{
++nClasses;
}
float vMin = (from x in data select x).Min();
float vMax = (from x in data select x).Max();
if (vMin >= vMax)
{
return null;
}
float vMean = (from x in data select x).Average();
PartitionData oRet = new PartitionData();
oRet.ClassesCount = nClasses;
oRet.Limits = new float[nClasses + 1];
oRet.Classes = new int[n];
float dn = (float)2.5;
float deltaSup = (float)((vMax - vMean)/dn);
float deltaInf = (float)((vMean - vMin) / dn);
int iSup = nClasses;
int iInf = 0;
float fMin =vMin;
float fMax = vMax;
while (iInf < iSup)
{
oRet.Limits[iInf++] = fMin;
oRet.Limits[iSup--] = fMax;
fMin = (float)(fMin + deltaInf);
fMax = (float)(fMax - deltaSup);
}// while
int zMax = nClasses - 1;
for (int i = 0; i < n; ++i)
{
float x = data[i];
if (x <= vMin)
{
oRet.Classes[i] = 0;
}
else if (x >= vMax)
{
oRet.Classes[i] = zMax;
}
else
{
for (int j = 0; j < nClasses; ++j)
{
if ((x >= oRet.Limits[j]) && (x < oRet.Limits[j + 1]))
{
oRet.Classes[i] = j;
break;
}
}// j
}
}// i
return oRet;
}
