public override float GetDistance(WineAttributes wine1, WineAttributes wine2)
{
float result = 0;
float temp = 0;
temp = wine1.Alcohol - wine2.Alcohol;
result = temp * temp;
temp = wine1.Chlorides - wine2.Chlorides;
result += temp * temp;
temp = wine1.CitricAcid - wine2.CitricAcid;
result += temp * temp;
temp = wine1.Density - wine2.Density;
result += temp * temp;
temp = wine1.FixedAcidity - wine2.FixedAcidity;
result += temp * temp;
temp = wine1.FreeSulfurDioxide - wine2.FreeSulfurDioxide;
result += temp * temp;
temp = wine1.PH - wine2.PH;
result += temp * temp;
temp = wine1.ResidualSugar - wine2.ResidualSugar;
result += temp * temp;
temp = wine1.Sulphates - wine2.Sulphates;
result += temp * temp;
temp = wine1.TotalSulfurDioxide - wine2.TotalSulfurDioxide;
result += temp * temp;
temp = wine1.VolatileAcidity - wine2.VolatileAcidity;
result += temp * temp;
return((float)Math.Sqrt(result));
}
public override float GetDistance(WineAttributes wine1, WineAttributes wine2)
{
// Removed following parameters:
// Residual Sugar
// Density
// Chlorides
// Sulphates
// Citric Acid
float result = 0;
float temp = 0;
temp = wine1.Alcohol - wine2.Alcohol;
result += temp * temp;
temp = wine1.FixedAcidity - wine2.FixedAcidity;
result += temp * temp;
temp = wine1.FreeSulfurDioxide - wine2.FreeSulfurDioxide;
result += temp * temp;
temp = wine1.PH - wine2.PH;
result += temp * temp;
temp = wine1.TotalSulfurDioxide - wine2.TotalSulfurDioxide;
result += temp * temp;
temp = wine1.VolatileAcidity - wine2.VolatileAcidity;
result += temp * temp;
return((float)Math.Sqrt(result));
}
/// <summary>
/// Parses all the Attributes out of one Line.
/// </summary>
/// <param name="line">The string representing the current line.</param>
/// <returns>An object, which holds all the Wine's Data.</returns>
private WineAttributes ParseAttributes(string line)
{
int i = 0;
WineAttributes attribute = new WineAttributes();
CultureInfo ci = (CultureInfo)CultureInfo.CurrentCulture.Clone();
ci.NumberFormat.CurrencyDecimalSeparator = ".";
var fields = typeof(WineAttributes).GetFields();
var lst = line.Split(';');
foreach (var item in fields)
{
if (item.FieldType == typeof(float))
{
item.SetValue(attribute, float.Parse(lst[i], NumberStyles.Any, ci));
}
i++;
}
attribute.Quality = int.Parse(lst.Last());
return(attribute);
}
public bool Equals(WineAttributes y)
{
return(Alcohol == y.Alcohol &&
Chlorides == y.Chlorides &&
CitricAcid == y.CitricAcid &&
Density == y.Density &&
FixedAcidity == y.FixedAcidity &&
FreeSulfurDioxide == y.FreeSulfurDioxide &&
PH == y.PH &&
ResidualSugar == y.ResidualSugar &&
Sulphates == y.Sulphates &&
TotalSulfurDioxide == y.TotalSulfurDioxide &&
VolatileAcidity == y.VolatileAcidity);
}
public override float GetDistance(WineAttributes wine1, WineAttributes wine2)
{
float result = 0;
result += Math.Abs(wine1.Alcohol - wine2.Alcohol);
result += Math.Abs(wine1.Chlorides - wine2.Chlorides);
result += Math.Abs(wine1.CitricAcid - wine2.CitricAcid);
result += Math.Abs(wine1.Density - wine2.Density);
result += Math.Abs(wine1.FixedAcidity - wine2.FixedAcidity);
result += Math.Abs(wine1.FreeSulfurDioxide - wine2.FreeSulfurDioxide);
result += Math.Abs(wine1.PH - wine2.PH);
result += Math.Abs(wine1.ResidualSugar - wine2.ResidualSugar);
result += Math.Abs(wine1.Sulphates - wine2.Sulphates);
result += Math.Abs(wine1.TotalSulfurDioxide - wine2.TotalSulfurDioxide);
result += Math.Abs(wine1.VolatileAcidity - wine2.VolatileAcidity);
return(result);
}
/// <summary>
/// Reads all the Data from the CSV file and parses it into the Dictionaries.
/// </summary>
/// <param name="filename">The path to the File including the File Extension.</param>
/// <returns>True if parsing was successful, false otherwise</returns>
public bool ReadWineData(string filename)
{
try
{
string line;
// Read the file and display it line by line.
using (StreamReader sr = new StreamReader(filename))
{
sr.ReadLine(); //Throw away header
while ((line = sr.ReadLine()) != null)
{
WineAttributes attr = ParseAttributes(line);
if (_TotalWineData[attr.Quality].Where(x => x.Equals(attr)).Count() == 0)
{
_TotalWineData[attr.Quality].Add(attr);
}
else
{
_floatWineData[attr.Quality].Add(attr);
}
}
}
}
catch (FileNotFoundException)
{
return(false);
}
if (_LoggingEnabled)
{
Console.WriteLine("Found " + _TotalWineData.Values.Sum(list => list.Count) + " unique wine datasets.");
Console.WriteLine("Found " + _floatWineData.Values.Sum(list => list.Count) + " redundant wine datasets.\n");
foreach (var dataSet in _TotalWineData.Where(x => x.Value.Count() > 0))
{
Console.WriteLine("quality: " + dataSet.Key + " - wines: " + dataSet.Value.Count());
}
}
return(true);
}
public abstract float GetDistance(WineAttributes wine1, WineAttributes wine2);
