/// <summary>Initializes an instance of the Patterns.</summary>
/// <param name="worker">The BackgroundWorker in wich Processing is run.</param>
/// <param name="sequence">The 'names' sequence.</param>
/// <param name="startIndex">The index in the inputArray at which scanning begins.</param>
/// <param name="strictLength">The precise length of range of inputArray for scanning.</param>
/// <param name="strictFreqs">The external array of strict frequencies; needed to avoid memory overallotment.</param>
/// <param name="loopsPerStep">The amount of loops per one progress bar step; -1 if without progress bar steps.</param>
/// <param name="maxFreqNumber">Return number of Pattern with max Frequence: if init value = -1, then no return.</param>
/// <param name="isFirstCall">True if method is called first time in cycle; otherwise, false.</param>
/// <param name="isDrawPlot">True if plot is drawing; otherwise, false.</param>
/// <returns>Maximum frequency value in the instance; if init maxFreqNumber param = -1, then 0.</returns>
int Init(
BackgroundWorker worker, byte[] sequence,
int startIndex, int strictLength, int[] strictFreqs, int loopsPerStep, ref int maxFreqNumber,
bool isFirstCall, bool isDrawPlot)
{
#region Comments
/*
* Patterns are generated from inputArray sequence on 2 steps.
*
* Step 1: Initialization strict frequency
* We create a new collection with the maximum possible length and an temporary array of strict frequencies.
* Index of each element for both collections is equal to absolute word number,
* so we scan through the input sequence and increase strict frequency in array directly by indexing.
*
* Step 2: Initialization Frequency
* From each pattern in collection we added the Frequency of all his Similars.
* In ALL POSSIBLE mode we search all the patterns, because their Similars may have Frequency > 0;
* in FROM INPUT mode we skip zero-frequency patterns.
*
* In TURBO mode all the Similars are keeping in memory after first generation,
* so we should go through the given Similars collection and adding thier Frequency directly by word number, equls to index in this instance.
* In ORDINARY mode we receive the sum of Frequencies of all Similars through single call of Similars.SumUp().
*
* So we receive the frequencies with mismatches for all the Patterns in this instance.
*
* This is the maximum fastest method because of using only direct indexing.
* We scan input sequence just once? and no searches through collection are required.
*/
#endregion
//System.Windows.Forms.MessageBox.Show(loopsPerStep.ToString());
int i, maxFreq = 0;
worker.ReportProgress(TreatSCANNING);
OnPrgBarReseat();
this.Clear();
Array.Clear(strictFreqs, 0, strictFreqs.Length);
//System.Windows.Forms.MessageBox.Show(startIndex.ToString("startIndex= 0 ") + strictLength.ToString("strictLength= 0 "));
//*** Step_1: Look over all the patterns in a range of sequence
for (i = 0; i <= strictLength; i++)
{
strictFreqs[Words.GetNumber(sequence, startIndex + i)]++;
}
//*** Step_2: expanding to mismatches
int k;
Similars smls;
//Pattern ptn;
// compare each Pattern to all the Pattern's in the same collection with a glance of mismathes;
// collection is still unsorted
for (i = 0; i < Count; i++)
{
if (worker.CancellationPending) // Canceled by user.
{
throw new ApplicationException(string.Empty);
}
if (IsAllPossible || (strictFreqs[i] > 0))
{
//ptn = this[i];
if (Similars.IsTurbo)
{
smls = Similars.GetSimilars(i);
for (k = 0; k < smls.Count; k++)
{
//ptn.Freq += strictFreqs[smls[k]];
this[i] += strictFreqs[smls[k]];
}
}
else
{
//ptn.Freq += Similars.SumUp(i, strictFreqs);
this[i] += Similars.SumUp(i, strictFreqs);
}
//ptn.WordNumber = i; // initialize number
//ptn.Freq += strictFreqs[i]; // frequency itself
this[i] += strictFreqs[i]; // frequency itself
//this[i] = ptn;
// keep index of maximum Freq without sorting: needs only in case of Max Average Choice or Global task.
//if (maxFreqNumber >= 0 && ptn.Freq > maxFreq)
if (maxFreqNumber >= 0 && this[i] > maxFreq)
{
//maxFreq = ptn.Freq;
maxFreq = this[i];
maxFreqNumber = i;
}
}
OnPrgBarIncreased(worker, loopsPerStep);
}
if (isDrawPlot)
{
// if it needs to keep sorting by name, we should clone collection for drawing,
// because it will be sorted by Freq during drawing
worker.ReportProgress(TreatSORTING);
worker.ReportProgress(Convert.ToInt32(isFirstCall), Clone());
}
return(maxFreq);
}
