public Problem(Experiments d, Features f)
{
data = d;
functions = f;
exSize = d.Size();
fSize = f.Size();
}
/// <summary>This is if we are given an array of double with a value for each training sample in the order of their occurrence.</summary>
public Feature(Experiments e, double[] vals, IIndex <IntPair> instanceIndex)
{
// todo [cdm 2013]: This needs to be removed! Try to put field in Features class, rather than adding as field to every object.
// the sum of all values
this.instanceIndex = instanceIndex;
IDictionary <int, double> setNonZeros = Generics.NewHashMap();
for (int i = 0; i < vals.Length; i++)
{
if (vals[i] != 0.0)
{
int @in = int.Parse(IndexOf(e.Get(i)[0], e.Get(i)[1]));
// new Integer(e.get(i)[0]*e.ySize+e.get(i)[1]);
double oldVal = setNonZeros[@in] = double.ValueOf(vals[i]);
if (oldVal != null && oldVal != vals[i])
{
throw new InvalidOperationException("Incorrect function specification: Feature has two values at one point: " + oldVal + " and " + vals[i]);
}
}
}
//if
// for
int[] keys = Sharpen.Collections.ToArray(setNonZeros.Keys, new int[setNonZeros.Keys.Count]);
indexedValues = new int[keys.Length];
valuesI = new double[keys.Length];
for (int j = 0; j < keys.Length; j++)
{
indexedValues[j] = keys[j];
valuesI[j] = setNonZeros[keys[j]];
}
// for
domain = e;
}
/// <param name="indexes">The pairs (x,y) for which the feature is non-zero. They are coded as x*ySize+y</param>
/// <param name="vals">The values at these points.</param>
public Feature(Experiments e, int[] indexes, double[] vals, IIndex <IntPair> instanceIndex)
{
domain = e;
indexedValues = indexes;
valuesI = vals;
this.instanceIndex = instanceIndex;
}
/// <param name="vals">a value for each (x,y) pair</param>
public Feature(Experiments e, double[][] vals, IIndex <IntPair> instanceIndex)
{
this.instanceIndex = instanceIndex;
domain = e;
int num = 0;
for (int x = 0; x < e.xSize; x++)
{
for (int y = 0; y < e.ySize; y++)
{
if (vals[x][y] != 0)
{
num++;
}
}
}
indexedValues = new int[num];
valuesI = new double[num];
int current = 0;
for (int x_1 = 0; x_1 < e.xSize; x_1++)
{
for (int y = 0; y < e.ySize; y++)
{
if (vals[x_1][y] != 0)
{
indexedValues[current] = IndexOf(x_1, y);
valuesI[current] = vals[x_1][y];
current++;
}
}
}
}
public Feature(Experiments e, int numElems, IIndex <IntPair> instanceIndex)
{
//if
//for
this.instanceIndex = instanceIndex;
domain = e;
indexedValues = new int[numElems];
valuesI = new double[numElems];
}
/// <summary>
/// reads in the features from a file, having already read the
/// experiments
/// </summary>
public Features(string filename, Experiments domain)
{
Exception e1 = new Exception("Incorrect data file format!");
IIndex <IntPair> instanceIndex = domain.CreateIndex();
try
{
using (BufferedReader @in = new BufferedReader(new FileReader(filename)))
{
string s;
while (true)
{
s = @in.ReadLine();
if (s.Equals("<features>"))
{
break;
}
}
if (s == null)
{
throw e1;
}
s = @in.ReadLine();
if (!s.StartsWith("<fSize>"))
{
throw e1;
}
if (!s.EndsWith("</fSize>"))
{
throw e1;
}
int index1 = s.IndexOf(">");
int index2 = s.LastIndexOf("<");
string fSt = Sharpen.Runtime.Substring(s, index1 + 1, index2);
System.Console.Out.WriteLine(fSt);
int number = System.Convert.ToInt32(fSt);
System.Console.Out.WriteLine("fSize is " + number);
int[] arrIndexes = new int[maxValue];
double[] arrValues = new double[maxValue];
for (int f = 0; f < number; f++)
{
string line = @in.ReadLine();
int indSp = -1;
int current = 0;
while ((indSp = line.IndexOf(" ")) > -1)
{
int x = System.Convert.ToInt32(Sharpen.Runtime.Substring(line, 0, indSp));
line = Sharpen.Runtime.Substring(line, indSp + 1);
indSp = line.IndexOf(" ");
if (indSp == -1)
{
indSp = line.Length;
}
int y = System.Convert.ToInt32(Sharpen.Runtime.Substring(line, 0, indSp));
line = Sharpen.Runtime.Substring(line, indSp + 1);
indSp = line.IndexOf(" ");
if (indSp == -1)
{
indSp = line.Length;
}
double val = double.ParseDouble(Sharpen.Runtime.Substring(line, 0, indSp));
if (indSp < line.Length)
{
line = Sharpen.Runtime.Substring(line, indSp + 1);
}
arrIndexes[current] = instanceIndex.IndexOf(new IntPair(x, y));
arrValues[current] = val;
current++;
}
int[] indValues = new int[current];
double[] values = new double[current];
for (int j = 0; j < current; j++)
{
indValues[j] = arrIndexes[j];
values[j] = arrValues[j];
}
Feature bf = new Feature(domain, indValues, values, instanceIndex);
this.Add(bf);
}
}
}
catch (Exception e)
{
// for f
log.Warn(e);
}
}
