private void Entropy(object sender, RoutedEventArgs e)
{
string text = RichText.GetText(OriginalText).Substring(0, RichText.GetText(OriginalText).Length - 2).ToLower();
if (!checkText(text))
{
MessageBox.Show("Введите символ алфавита, не пустую строку :)");
return;
}
int[] alphCount = new int[alph.Length];
int n = 0;
double[] alphChance = new double[alph.Length];
double entropy = 0.0D;
string rplChars = " ,.!?:-;()[]'\"";
foreach (var chr in rplChars)
{
text = text.Replace(chr.ToString(), "");
}
string binText = "";
var textChr = Encoding.ASCII.GetBytes(text);
foreach (int chr in textChr)
{
binText += Convert.ToString(chr, 2).PadLeft(8, '0');
}
for (int i = 0; i < binText.Length; i++)
{
for (int j = 0; j < alph.Length; j++)
{
if (binText[i] == alph[j])
{
alphCount[j]++;
n++;
}
}
}
for (int i = 0; i < alphChance.Length; i++)
{
alphChance[i] = (double)alphCount[i] / n;
}
for (int i = 0; i < alphChance.Length; i++)
{
if (alphChance[i] != 0)
{
entropy += alphChance[i] * Math.Log(alphChance[i], 2);
}
}
TextEntropy.Text = (entropy * (-1)).ToString();
}
