public static double[] getOLSRegression(XYDataset data, int series)
{
int itemCount = data.getItemCount(series);
if (itemCount < 2)
{
string str = "Not enough data.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else
{
double num1 = 0.0;
double num2 = 0.0;
double num3 = 0.0;
double num4 = 0.0;
for (int i2 = 0; i2 < itemCount; ++i2)
{
double xvalue = data.getXValue(series, i2);
double yvalue = data.getYValue(series, i2);
num1 += xvalue;
num2 += yvalue;
double num5 = xvalue * xvalue;
num3 += num5;
double num6 = xvalue * yvalue;
num4 += num6;
}
double num7 = num3 - num1 * num1 / (double) itemCount;
double num8 = num4 - num1 * num2 / (double) itemCount;
double num9 = num1 / (double) itemCount;
double num10 = num2 / (double) itemCount;
double[] numArray = new double[2]
{
0.0,
num8 / num7
};
numArray[0] = num10 - numArray[1] * num9;
return numArray;
}
}
protected internal override void drawPrimaryLineAsPath(XYItemRendererState state, Graphics2D g2, XYPlot plot, XYDataset dataset, int pass, int series, int item, ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea)
{
RectangleEdge domainAxisEdge = plot.getDomainAxisEdge();
RectangleEdge rangeAxisEdge = plot.getRangeAxisEdge();
double xvalue = dataset.getXValue(series, item);
double yvalue = dataset.getYValue(series, item);
double num1 = domainAxis.valueToJava2D(xvalue, dataArea, domainAxisEdge);
double num2 = rangeAxis.valueToJava2D(yvalue, dataArea, rangeAxisEdge);
if (!Double.isNaN(num1) && !Double.isNaN(num2))
{
XYSplineRenderer.ControlPoint controlPoint = new XYSplineRenderer.ControlPoint(this, plot.getOrientation() != PlotOrientation.__\u003C\u003EHORIZONTAL ? (float) num1 : (float) num2, plot.getOrientation() != PlotOrientation.__\u003C\u003EHORIZONTAL ? (float) num2 : (float) num1);
if (!this.points.contains((object) controlPoint))
this.points.add((object) controlPoint);
}
if (item != dataset.getItemCount(series) - 1)
return;
XYLineAndShapeRenderer.State state1 = (XYLineAndShapeRenderer.State) state;
if (this.points.size() > 1)
{
XYSplineRenderer.ControlPoint controlPoint1 = (XYSplineRenderer.ControlPoint) this.points.get(0);
((Path2D.Float) state1.seriesPath).moveTo(controlPoint1.x, controlPoint1.y);
if (this.points.size() == 2)
{
XYSplineRenderer.ControlPoint controlPoint2 = (XYSplineRenderer.ControlPoint) this.points.get(1);
((Path2D.Float) state1.seriesPath).lineTo(controlPoint2.x, controlPoint2.y);
}
else
{
int length = this.points.size();
float[] numArray1 = new float[length];
float[] numArray2 = new float[length];
float[] numArray3 = new float[length];
float[] numArray4 = new float[length];
for (int index = 0; index < length; ++index)
{
XYSplineRenderer.ControlPoint controlPoint2 = (XYSplineRenderer.ControlPoint) this.points.get(index);
numArray2[index] = controlPoint2.x;
numArray1[index] = controlPoint2.y;
}
for (int index = 1; index <= length - 1; ++index)
numArray4[index] = numArray2[index] - numArray2[index - 1];
float[] numArray5 = new float[length - 1];
float[] numArray6 = new float[length - 1];
float[] numArray7 = new float[length - 1];
for (int index = 1; index <= length - 2; ++index)
{
numArray6[index] = (numArray4[index] + numArray4[index + 1]) / 3f;
numArray7[index] = numArray4[index + 1] / 6f;
numArray5[index] = numArray4[index] / 6f;
numArray3[index] = (numArray1[index + 1] - numArray1[index]) / numArray4[index + 1] - (numArray1[index] - numArray1[index - 1]) / numArray4[index];
}
this.solveTridiag(numArray5, numArray6, numArray7, numArray3, length - 2);
float num3 = numArray2[0];
float num4 = numArray1[0];
((Path2D.Float) state1.seriesPath).moveTo(num3, num4);
for (int index1 = 1; index1 <= length - 1; ++index1)
{
for (int index2 = 1; index2 <= this.precision; ++index2)
{
float num5 = numArray4[index1] * (float) index2 / (float) this.precision;
float num6 = numArray4[index1] - num5;
float num7 = (((float) (-(double) numArray3[index1 - 1] / 6.0) * (num6 + numArray4[index1]) * num5 + numArray1[index1 - 1]) * num6 + ((float) (-(double) numArray3[index1] / 6.0) * (num5 + numArray4[index1]) * num6 + numArray1[index1]) * num5) / numArray4[index1];
float num8 = numArray2[index1 - 1] + num5;
((Path2D.Float) state1.seriesPath).lineTo(num8, num7);
}
}
}
this.drawFirstPassShape(g2, pass, series, item, (Shape) state1.seriesPath);
}
this.points = new Vector();
}
public virtual void drawSeries(Graphics2D g2, Rectangle2D dataArea, PlotRenderingInfo info, PolarPlot plot, XYDataset dataset, int seriesIndex)
{
Polygon polygon = new Polygon();
int itemCount = dataset.getItemCount(seriesIndex);
for (int i2 = 0; i2 < itemCount; ++i2)
{
double xvalue = dataset.getXValue(seriesIndex, i2);
double yvalue = dataset.getYValue(seriesIndex, i2);
Point point = plot.translateValueThetaRadiusToJava2D(xvalue, yvalue, dataArea);
polygon.addPoint((int) point.x, (int) point.y);
}
g2.setPaint(this.lookupSeriesPaint(seriesIndex));
g2.setStroke(this.lookupSeriesStroke(seriesIndex));
if (this.isSeriesFilled(seriesIndex))
{
Composite composite = g2.getComposite();
g2.setComposite((Composite) AlphaComposite.getInstance(3, 0.5f));
g2.fill((Shape) polygon);
g2.setComposite(composite);
}
else
g2.draw((Shape) polygon);
}
public static XYSeries createMovingAverage(XYDataset source, int series, string name, double period, double skip)
{
if (source == null)
{
string str = "Null source (XYDataset).";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else if (period < 4.94065645841247E-324)
{
string str = "period must be positive.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else if (skip < 0.0)
{
string str = "skip must be >= 0.0.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else
{
XYSeries xySeries = new XYSeries((IComparable) name);
if (source.getItemCount(series) > 0)
{
double num1 = source.getXValue(series, 0) + skip;
int i2 = source.getItemCount(series) - 1;
while (i2 >= 0)
{
double xvalue1 = source.getXValue(series, i2);
if (xvalue1 >= num1)
{
int num2 = 0;
double num3 = 0.0;
double num4 = xvalue1 - period;
int num5 = 0;
int num6 = 0;
while (num6 == 0)
{
if (i2 - num5 >= 0)
{
double xvalue2 = source.getXValue(series, i2 - num5);
Number y = source.getY(series, i2 - num5);
if (xvalue2 > num4)
{
if (y != null)
{
num3 += y.doubleValue();
++num2;
}
}
else
num6 = 1;
}
else
num6 = 1;
++num5;
}
if (num2 > 0)
xySeries.add(xvalue1, num3 / (double) num2);
else
xySeries.add(xvalue1, (Number) null);
}
i2 += -1;
}
}
return xySeries;
}
}
public static double[] getPowerRegression(XYDataset data, int series)
{
int itemCount = data.getItemCount(series);
if (itemCount < 2)
{
string str = "Not enough data.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else
{
double num1 = 0.0;
double num2 = 0.0;
double num3 = 0.0;
double num4 = 0.0;
for (int i2 = 0; i2 < itemCount; ++i2)
{
double num5 = Math.log(data.getXValue(series, i2));
double num6 = Math.log(data.getYValue(series, i2));
num1 += num5;
num2 += num6;
double num7 = num5 * num5;
num3 += num7;
double num8 = num5 * num6;
num4 += num8;
}
double num9 = num3 - num1 * num1 / (double) itemCount;
double num10 = num4 - num1 * num2 / (double) itemCount;
double num11 = num1 / (double) itemCount;
double num12 = num2 / (double) itemCount;
double[] numArray = new double[2]
{
0.0,
num10 / num9
};
numArray[0] = Math.pow(Math.exp(1.0), num12 - numArray[1] * num11);
return numArray;
}
}
public static int findLiveItemsLowerBound(XYDataset dataset, int series, double xLow, double xHigh)
{
if (dataset == null)
{
string str = "Null 'dataset' argument.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else if (xLow >= xHigh)
{
string str = "Requires xLow < xHigh.";
Throwable.__\u003CsuppressFillInStackTrace\u003E();
throw new IllegalArgumentException(str);
}
else
{
int itemCount = dataset.getItemCount(series);
if (itemCount <= 1)
return 0;
if (dataset.getDomainOrder() == DomainOrder.__\u003C\u003EASCENDING)
{
int i2_1 = 0;
int i2_2 = itemCount - 1;
if (dataset.getXValue(series, i2_1) >= xLow)
return i2_1;
if (dataset.getXValue(series, i2_2) < xLow)
return i2_2;
while (i2_2 - i2_1 > 1)
{
int i2_3 = (i2_1 + i2_2) / 2;
if (dataset.getXValue(series, i2_3) >= xLow)
i2_2 = i2_3;
else
i2_1 = i2_3;
}
return i2_2;
}
else if (dataset.getDomainOrder() == DomainOrder.__\u003C\u003EDESCENDING)
{
int i2_1 = 0;
int i2_2 = itemCount - 1;
if (dataset.getXValue(series, i2_1) <= xHigh)
return i2_1;
if (dataset.getXValue(series, i2_2) > xHigh)
return i2_2;
while (i2_2 - i2_1 > 1)
{
int i2_3 = (i2_1 + i2_2) / 2;
if (dataset.getXValue(series, i2_3) > xHigh)
i2_1 = i2_3;
else
i2_2 = i2_3;
int num = (i2_1 + i2_2) / 2;
}
return i2_2;
}
else
{
int i2 = 0;
double xvalue = dataset.getXValue(series, i2);
while (i2 < itemCount && (xvalue < xLow || xvalue > xHigh))
{
++i2;
if (i2 < itemCount)
xvalue = dataset.getXValue(series, i2);
}
return Math.min(Math.max(0, i2), itemCount - 1);
}
}
}